diff --git a/ext/bg/js/database.js b/ext/bg/js/database.js
index 7f4c6ac6..06786881 100644
--- a/ext/bg/js/database.js
+++ b/ext/bg/js/database.js
@@ -148,6 +148,79 @@ class Database {
         return this.db.dictionaries.toArray();
     }
 
+    deleteDictionary(title, callback) {
+        if (this.db === null) {
+            return Promise.reject('database not initialized');
+        }
+
+        return this.db.dictionaries.where('title').equals(title).first(info => {
+            if (!info) {
+                return;
+            }
+
+            let termCounter = Promise.resolve(0);
+            if (info.hasTerms) {
+                termCounter = this.db.terms.where('dictionary').equals(title).count();
+            }
+
+            let kanjiCounter = Promise.resolve(0);
+            if (info.hasKanji) {
+                kanjiCounter = this.db.kanji.where('dictionary').equals(title).count();
+            }
+
+            return Promise.all([termCounter, kanjiCounter]).then(([termCount, kanjiCount]) => {
+                const totalCount = termCount + kanjiCount;
+                let deletedCount = 0;
+
+                let termDeleter = Promise.resolve();
+                if (info.hasTerms) {
+                    const termDeleterFunc = () => {
+                        return this.db.terms.where('dictionary').equals(title).limit(1000).delete().then(count => {
+                            if (count === 0) {
+                                return Promise.resolve();
+                            }
+
+                            deletedCount += count;
+                            if (callback) {
+                                callback(totalCount, deletedCount);
+                            }
+
+                            return termDeleterFunc();
+                        });
+                    };
+
+                    termDeleter = termDeleterFunc();
+                }
+
+                let kanjiDeleter = Promise.resolve();
+                if (info.hasKanji) {
+                    const kanjiDeleterFunc = () => {
+                        return this.db.kanji.where('dictionary').equals(title).limit(1000).delete().then(count => {
+                            if (count === 0) {
+                                return Promise.resolve();
+                            }
+
+                            deletedCount += count;
+                            if (callback) {
+                                callback(totalCount, deletedCount);
+                            }
+
+                            return kanjiDeleterFunc();
+                        });
+                    };
+
+                    kanjiDeleter = kanjiDeleterFunc();
+                }
+
+                return Promise.all([termDeleter, kanjiDeleter]);
+            });
+        }).then(() => {
+            return this.db.entities.where('dictionary').equals(title).delete();
+        }).then(() => {
+            return this.db.dictionaries.where('title').equals(title).delete();
+        });
+    }
+
     importDictionary(indexUrl, callback) {
         if (this.db === null) {
             return Promise.reject('database not initialized');
diff --git a/ext/bg/js/options-form.js b/ext/bg/js/options-form.js
index 3d1530ad..3a201bc5 100644
--- a/ext/bg/js/options-form.js
+++ b/ext/bg/js/options-form.js
@@ -141,6 +141,7 @@ function populateDictionaries(opts) {
         });
 
         $('.dict-enable-terms, .dict-enable-kanji').change(onOptionsChanged);
+        $('.dict-delete').click(onDictionaryDelete);
     }).catch(error => {
         dictError.show().find('span').text(error);
     }).then(() => {
@@ -148,6 +149,36 @@ function populateDictionaries(opts) {
     });
 }
 
+function onDictionaryDelete() {
+    const dictGroup = $(this).closest('.dict-group');
+
+    const dictError = $('#dict-error');
+    dictError.hide();
+
+    const dictSpinner = $('#dict-spinner');
+    dictSpinner.show();
+
+    const dictProgress = dictGroup.find('.dict-delete-progress');
+    dictProgress.show();
+
+    const dictControls = dictGroup.find('.dict-controls');
+    dictControls.hide();
+
+    const callback = (total, current) => {
+        dictProgress.find('div').css('width', `${current / total * 100.0}%`);
+    };
+
+    database().deleteDictionary(dictGroup.data('title'), callback).then(() => {
+        dictGroup.slideUp();
+    }).catch(error => {
+        dictError.show().find('span').text(error);
+    }).then(() => {
+        dictSpinner.hide();
+        dictProgress.hide();
+        dictControls.show();
+    });
+}
+
 function onDictionaryImport() {
     const dictImport = $(this);
     dictImport.prop('disabled', true);
@@ -155,7 +186,7 @@ function onDictionaryImport() {
     const dictError = $('#dict-error');
     dictError.hide();
 
-    const dictProgress = $('.dict-progress');
+    const dictProgress = $('.dict-import-progress');
     dictProgress.show();
 
     const dictSpinner = $('#dict-spinner');
diff --git a/ext/bg/js/templates.js b/ext/bg/js/templates.js
index 988533fb..f80824f9 100644
--- a/ext/bg/js/templates.js
+++ b/ext/bg/js/templates.js
@@ -9,17 +9,17 @@ templates['dictionary.html'] = template({"1":function(container,depth0,helpers,p
 
   return "<div class=\"dict-group well well-sm\" data-title=\""
     + alias4(((helper = (helper = helpers.title || (depth0 != null ? depth0.title : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"title","hash":{},"data":data}) : helper)))
-    + "\">\n    <h4><span class=\"text-muted glyphicon glyphicon-book\"></span> "
+    + "\">\n    <div class=\"row\">\n        <div class=\"col-xs-8\">\n            <h4><span class=\"text-muted glyphicon glyphicon-book\"></span> "
     + alias4(((helper = (helper = helpers.title || (depth0 != null ? depth0.title : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"title","hash":{},"data":data}) : helper)))
     + " <small>v."
     + alias4(((helper = (helper = helpers.version || (depth0 != null ? depth0.version : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"version","hash":{},"data":data}) : helper)))
-    + "</small></h4>\n    <div class=\"checkbox "
+    + "</small></h4>\n        </div>\n        <div class=\"col-xs-4 text-right disabled\">\n            <button type=\"button\" class=\"dict-controls dict-delete btn btn-danger\">Delete</button>\n        </div>\n    </div>\n    <div class=\"dict-delete-progress\">Dictionary data is being deleted, please be patient...</div>\n    <div class=\"progress dict-delete-progress\">\n        <div class=\"progress-bar progress-bar-striped progress-bar-danger\" style=\"width: 0%\"></div>\n    </div>\n    <div class=\"checkbox dict-controls "
     + ((stack1 = helpers.unless.call(alias1,(depth0 != null ? depth0.hasTerms : depth0),{"name":"unless","hash":{},"fn":container.program(1, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "\">\n        <label><input type=\"checkbox\" class=\"dict-enable-terms\" "
     + ((stack1 = helpers.unless.call(alias1,(depth0 != null ? depth0.hasTerms : depth0),{"name":"unless","hash":{},"fn":container.program(1, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + " "
     + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.enableTerms : depth0),{"name":"if","hash":{},"fn":container.program(3, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
-    + "> Enable term search</label>\n    </div>\n    <div class=\"checkbox "
+    + "> Enable term search</label>\n    </div>\n    <div class=\"checkbox dict-controls "
     + ((stack1 = helpers.unless.call(alias1,(depth0 != null ? depth0.hasKanji : depth0),{"name":"unless","hash":{},"fn":container.program(1, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "\">\n        <label><input type=\"checkbox\" class=\"dict-enable-kanji\" "
     + ((stack1 = helpers.unless.call(alias1,(depth0 != null ? depth0.hasKanji : depth0),{"name":"unless","hash":{},"fn":container.program(1, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
diff --git a/ext/bg/options.html b/ext/bg/options.html
index 9026520b..4f74a58e 100644
--- a/ext/bg/options.html
+++ b/ext/bg/options.html
@@ -7,7 +7,7 @@
         <link rel="stylesheet" type="text/css" href="../lib/bootstrap-3.3.6-dist/css/bootstrap-theme.min.css">
         <style>
             #anki-spinner, #anki-general, #anki-error,
-            #dict-spinner, .dict-progress,
+            #dict-spinner, .dict-import-progress, .dict-delete-progress,
             #options-advanced {
                 display: none;
             }
@@ -75,8 +75,8 @@
                     <span></span>
                 </div>
 
-                <div class="dict-progress">Dictionary data is being imported, please be patient...</div>
-                <div class="progress dict-progress">
+                <div class="dict-import-progress">Dictionary data is being imported, please be patient...</div>
+                <div class="progress dict-import-progress">
                     <div class="progress-bar progress-bar-striped" style="width: 0%"></div>
                 </div>
 
diff --git a/tmpl/dictionary.html b/tmpl/dictionary.html
index 7da9f660..134209c8 100644
--- a/tmpl/dictionary.html
+++ b/tmpl/dictionary.html
@@ -1,9 +1,20 @@
 <div class="dict-group well well-sm" data-title="{{title}}">
-    <h4><span class="text-muted glyphicon glyphicon-book"></span> {{title}} <small>v.{{version}}</small></h4>
-    <div class="checkbox {{#unless hasTerms}}disabled{{/unless}}">
+    <div class="row">
+        <div class="col-xs-8">
+            <h4><span class="text-muted glyphicon glyphicon-book"></span> {{title}} <small>v.{{version}}</small></h4>
+        </div>
+        <div class="col-xs-4 text-right disabled">
+            <button type="button" class="dict-controls dict-delete btn btn-danger">Delete</button>
+        </div>
+    </div>
+    <div class="dict-delete-progress">Dictionary data is being deleted, please be patient...</div>
+    <div class="progress dict-delete-progress">
+        <div class="progress-bar progress-bar-striped progress-bar-danger" style="width: 0%"></div>
+    </div>
+    <div class="checkbox dict-controls {{#unless hasTerms}}disabled{{/unless}}">
         <label><input type="checkbox" class="dict-enable-terms" {{#unless hasTerms}}disabled{{/unless}} {{#if enableTerms}}checked{{/if}}> Enable term search</label>
     </div>
-    <div class="checkbox {{#unless hasKanji}}disabled{{/unless}}">
+    <div class="checkbox dict-controls {{#unless hasKanji}}disabled{{/unless}}">
         <label><input type="checkbox" class="dict-enable-kanji" {{#unless hasKanji}}disabled{{/unless}} {{#if enableKanji}}checked{{/if}}> Enable Kanji search</label>
     </div>
 </div>