diff --git a/src/librustdoc/html/render/mod.rs b/src/librustdoc/html/render/mod.rs
index 5fb2d9f6f917c..4cbc56333b155 100644
--- a/src/librustdoc/html/render/mod.rs
+++ b/src/librustdoc/html/render/mod.rs
@@ -3450,7 +3450,7 @@ fn spotlight_decl(decl: &clean::FnDecl) -> String {
                 if impl_.trait_.def_id().map_or(false, |d| c.traits[&d].is_spotlight) {
                     if out.is_empty() {
                         out.push_str(&format!(
-                            "<h3 class=\"important\">Important traits for {}</h3>\
+                            "<h3 class=\"notable\">Notable traits for {}</h3>\
                                       <code class=\"content\">",
                             impl_.for_.print()
                         ));
@@ -3485,7 +3485,7 @@ fn spotlight_decl(decl: &clean::FnDecl) -> String {
     if !out.is_empty() {
         out.insert_str(
             0,
-            "<span class=\"important-traits\"><span class=\"important-traits-tooltip\">ⓘ<div class='important-traits-tooltiptext'><span class=\"docblock\">"
+            "<span class=\"notable-traits\"><span class=\"notable-traits-tooltip\">ⓘ<div class='notable-traits-tooltiptext'><span class=\"docblock\">"
 
         );
         out.push_str("</code></span></div></span></span>");
diff --git a/src/librustdoc/html/static/main.js b/src/librustdoc/html/static/main.js
index 082f9cca064f1..19284018a30db 100644
--- a/src/librustdoc/html/static/main.js
+++ b/src/librustdoc/html/static/main.js
@@ -2636,9 +2636,9 @@ function defocusSearchBar() {
         });
     }());
 
-    onEachLazy(document.getElementsByClassName("important-traits"), function(e) {
+    onEachLazy(document.getElementsByClassName("notable-traits"), function(e) {
         e.onclick = function() {
-            this.getElementsByClassName('important-traits-tooltiptext')[0]
+            this.getElementsByClassName('notable-traits-tooltiptext')[0]
                 .classList.toggle("force-tooltip");
         };
     });
diff --git a/src/librustdoc/html/static/rustdoc.css b/src/librustdoc/html/static/rustdoc.css
index d0312d77a7c5d..db0e4f4d31df8 100644
--- a/src/librustdoc/html/static/rustdoc.css
+++ b/src/librustdoc/html/static/rustdoc.css
@@ -91,7 +91,7 @@ h2 {
 h3 {
 	font-size: 1.3em;
 }
-h1, h2, h3:not(.impl):not(.method):not(.type):not(.tymethod):not(.important),
+h1, h2, h3:not(.impl):not(.method):not(.type):not(.tymethod):not(.notable),
 h4:not(.method):not(.type):not(.tymethod):not(.associatedconstant) {
 	font-weight: 500;
 	margin: 20px 0 15px 0;
@@ -528,7 +528,7 @@ h4 > code, h3 > code, .invisible > code {
 	font-size: 0.8em;
 }
 
-.content .methods > div:not(.important-traits) {
+.content .methods > div:not(.notable-traits) {
 	margin-left: 40px;
 	margin-bottom: 15px;
 }
@@ -1099,17 +1099,17 @@ h3 > .collapse-toggle, h4 > .collapse-toggle {
 	font-size: 20px;
 }
 
-.important-traits-tooltip {
+.notable-traits-tooltip {
 	display: inline-block;
 	cursor: pointer;
 }
 
-.important-traits:hover .important-traits-tooltiptext,
-.important-traits .important-traits-tooltiptext.force-tooltip {
+.notable-traits:hover .notable-traits-tooltiptext,
+.notable-traits .notable-traits-tooltiptext.force-tooltip {
 	display: inline-block;
 }
 
-.important-traits .important-traits-tooltiptext {
+.notable-traits .notable-traits-tooltiptext {
 	display: none;
 	padding: 5px 3px 3px 3px;
 	border-radius: 6px;
@@ -1121,18 +1121,18 @@ h3 > .collapse-toggle, h4 > .collapse-toggle {
 	border: 1px solid;
 }
 
-.important-traits-tooltip::after {
+.notable-traits-tooltip::after {
 	/* The margin on the tooltip does not capture hover events,
 	   this extends the area of hover enough so that mouse hover is not
 	   lost when moving the mouse to the tooltip */
 	content: "\00a0\00a0\00a0";
 }
 
-.important-traits .important, .important-traits .docblock {
+.notable-traits .notable, .notable-traits .docblock {
 	margin: 0;
 }
 
-.important-traits .docblock code.content{
+.notable-traits .docblock code.content{
 	margin: 0;
 	padding: 0;
 	font-size: 20px;
@@ -1183,13 +1183,13 @@ pre.rust {
 	font-size: 16px;
 }
 
-.important-traits {
+.notable-traits {
 	cursor: pointer;
 	z-index: 2;
 	margin-left: 5px;
 }
 
-h4 > .important-traits {
+h4 > .notable-traits {
 	position: absolute;
 	left: -44px;
 	top: 2px;
@@ -1431,7 +1431,7 @@ h4 > .important-traits {
 		z-index: 1;
 	}
 
-	h4 > .important-traits {
+	h4 > .notable-traits {
 		position: absolute;
 		left: -22px;
 		top: 24px;
@@ -1522,7 +1522,7 @@ h4 > .important-traits {
 		margin-top: 0;
 	}
 
-	.important-traits .important-traits-tooltiptext {
+	.notable-traits .notable-traits-tooltiptext {
 		left: 0;
 		top: 100%;
 	}
@@ -1544,7 +1544,7 @@ h4 > .important-traits {
 	}
 }
 
-h3.important {
+h3.notable {
 	margin: 0;
 	margin-bottom: 13px;
 	font-size: 19px;
diff --git a/src/librustdoc/html/static/themes/ayu.css b/src/librustdoc/html/static/themes/ayu.css
index f4710f6ae873a..60f0d25b219e7 100644
--- a/src/librustdoc/html/static/themes/ayu.css
+++ b/src/librustdoc/html/static/themes/ayu.css
@@ -389,7 +389,7 @@ pre.ignore:hover, .information:hover + pre.ignore {
 	border-color: transparent #314559 transparent transparent;
 }
 
-.important-traits-tooltiptext {
+.notable-traits-tooltiptext {
 	background-color: #314559;
 	border-color: #5c6773;
 }
diff --git a/src/librustdoc/html/static/themes/dark.css b/src/librustdoc/html/static/themes/dark.css
index b3b586ba362fa..34c6cbbf4fa21 100644
--- a/src/librustdoc/html/static/themes/dark.css
+++ b/src/librustdoc/html/static/themes/dark.css
@@ -339,7 +339,7 @@ pre.ignore:hover, .information:hover + pre.ignore {
 	border-color: transparent black transparent transparent;
 }
 
-.important-traits-tooltiptext {
+.notable-traits-tooltiptext {
 	background-color: #111;
 	border-color: #777;
 }
diff --git a/src/librustdoc/html/static/themes/light.css b/src/librustdoc/html/static/themes/light.css
index b0c5715604baa..137aad4ed4398 100644
--- a/src/librustdoc/html/static/themes/light.css
+++ b/src/librustdoc/html/static/themes/light.css
@@ -333,7 +333,7 @@ pre.ignore:hover, .information:hover + pre.ignore {
 	border-color: transparent black transparent transparent;
 }
 
-.important-traits-tooltiptext {
+.notable-traits-tooltiptext {
 	background-color: #eee;
 	border-color: #999;
 }