diff --git a/acm/acm-backend-elisp.el b/acm/acm-backend-elisp.el
index eafacea6c1..db94db2d01 100644
--- a/acm/acm-backend-elisp.el
+++ b/acm/acm-backend-elisp.el
@@ -152,6 +152,26 @@
         (t
          "variable")))
 
+(defun acm-backend-elisp-open-feature-file (feature-string)
+  "Open the file that defines the given FEATURE-STRING."
+  (let ((library-path (locate-library feature-string)))
+    (if library-path
+        (find-file library-path)
+      (message "Feature not found: %s" feature-string))))
+
+(defun acm-backend-elisp-find-def ()
+  (let* ((symbol-string (thing-at-point 'symbol t))
+         (symbol (intern symbol-string)))
+    (pcase (acm-backend-elisp-symbol-type symbol)
+      ("feature" (acm-backend-elisp-open-feature-file symbol-string))
+      ("special form" (find-variable symbol))
+      ("function" (find-function symbol))
+      ("macro" (find-function symbol))
+      ("face" (find-face-definition symbol))
+      ("custom" (find-variable symbol))
+      ("constant" (find-variable symbol))
+      ("variable" (find-variable symbol)))))
+
 (defun acm-backend-elisp-global-symbols ()
   (all-completions ""
                    obarray
diff --git a/lsp-bridge.el b/lsp-bridge.el
index f7a66bd357..ba93dcece2 100644
--- a/lsp-bridge.el
+++ b/lsp-bridge.el
@@ -1471,13 +1471,21 @@ So we build this macro to restore postion after code format."
 
 (defun lsp-bridge-find-def ()
   (interactive)
-  (setq-local lsp-bridge-jump-to-def-in-other-window nil)
-  (lsp-bridge-call-file-api "find_define" (lsp-bridge--position)))
+  (cond
+   ((acm-is-elisp-mode-p)
+    (acm-backend-elisp-find-def))
+   (t
+    (setq-local lsp-bridge-jump-to-def-in-other-window nil)
+    (lsp-bridge-call-file-api "find_define" (lsp-bridge--position)))))
 
 (defun lsp-bridge-find-def-other-window ()
   (interactive)
-  (setq-local lsp-bridge-jump-to-def-in-other-window t)
-  (lsp-bridge-call-file-api "find_define" (lsp-bridge--position)))
+  (cond
+   ((acm-is-elisp-mode-p)
+    (acm-backend-elisp-find-def))
+   (t
+    (setq-local lsp-bridge-jump-to-def-in-other-window t)
+    (lsp-bridge-call-file-api "find_define" (lsp-bridge--position)))))
 
 (defun lsp-bridge-find-def-return ()
   "Pop off lsp-bridge-mark-ring and jump to the top location."