Let's say abbrev expands "com" into "commission".

The problem is that this expands "google.com" into "google.commission".

Is there a way to disable this expansion if "com" is preceded by a "."?

  • you can probably do so but it's a bit involved, not worth it. See emacs.stackexchange.com/questions/14058/… also read the elisp manual on abbrev.
    – Xah Lee
    Sep 25, 2016 at 15:34
  • instead, I'd recommend just make your abbrev zcom. Whenever you have abbrev that'll clash, add z in front. Or, prefix z for all your abbrevs.
    – Xah Lee
    Sep 25, 2016 at 15:35

1 Answer 1


I ended up solving this question using the :enable-function in define-abbrev-table (similar to what's recommended here: Do not expand a given abbrev when followed by ":").

My solution is to put all my abbreviations in the global-abbrev-table and all my exceptions in text-mode-abbrev-table. Then have an enable-function that checks that the character preceding the current word is not a ".".

(defun my-char-preceding-word ()

(define-abbrev-table 'text-mode-abbrev-table
  '(("com" "commission"))
  "My exceptions table."
  :enable-function (lambda ()
                     (not (eq (my-char-preceding-word) ?.))))

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