The Collaborative International Dictionary of English v.0.48:

-ed \-ed\
   The termination of the past participle of regular, or weak,
   verbs; also, of analogous participial adjectives from nouns;
   as, pigmented; talented.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ED
    n 1: impotence resulting from a man's inability to have or
         maintain an erection of his penis [syn: erectile
         dysfunction, male erecticle dysfunction, ED]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ED
       End Delimiter (FDDI, Token Ring)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ED
       Enhanced Density


The Jargon File (version 4.4.7, 29 Dec 2003):

ed
 n.

    ?ed is the standard text editor.? Line taken from the original Unix
    manual page on ed, an ancient line-oriented editor that is by now used only
    by a few Real Programmers, and even then only for batch operations. The
    original line is sometimes uttered near the beginning of an emacs vs. vi
    holy war on Usenet, with the (vain) hope to quench the discussion before
    it really takes off. Often followed by a standard text describing the many
    virtues of ed (such as the small memory footprint on a Timex Sinclair,
    and the consistent (because nearly non-existent) user interface).


The Free On-line Dictionary of Computing (30 December 2018):

ed

    (editor) Unix's line editor.  Ed is rarely
   used by humans since even vi is better.

   Unix manual page: ed(1).

   (1999-03-01)


Easton's 1897 Bible Dictionary:

Ed
   witness, a word not found in the original Hebrew, nor in the
   LXX. and Vulgate, but added by the translators in the Authorized
   Version, also in the Revised Version, of Josh. 22:34. The words
   are literally rendered: "And the children of Reuben and the
   children of Gad named the altar. It is a witness between us that
   Jehovah is God." This great altar stood probably on the east
   side of the Jordan, in the land of Gilead, "over against the
   land of Canaan." After the division of the Promised Land, the
   tribes of Reuben and Gad and the half-tribe of Manasseh, on
   returning to their own settlements on the east of Jordan (Josh.
   22:1-6), erected a great altar, which they affirmed, in answer
   to the challenge of the other tribes, was not for sacrifice, but
   only as a witness ('Ed) or testimony to future generations that
   they still retained the same interest in the nation as the other
   tribes.


Hitchcock's Bible Names Dictionary (late 1800's):

Ed, witness