Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Slang A foolish, inept, or unattractive person.
  • n. Slang A person who is single-minded or accomplished in scientific or technical pursuits but is felt to be socially inept.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A person who is intellectual but generally introverted
  • n. One who has an intense, obsessive interest in something.
  • n. An unattractive, socially awkward, annoying, undesirable, and/or boring, person; a dork.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an insignificant student who is ridiculed as being affected or boringly studious
  • n. an intelligent but single-minded expert in a particular technical field or profession

Etymologies

Perhaps after Nerd, a character in If I Ran the Zoo, by Theodor Seuss Geisel.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Unknown (Wiktionary)

Examples

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  • Long before 'nerd' took on its present meaning, it was commonly used by cartoonists and graphic artists to mean eraser crumbs...

    March 24, 2012

  • "And then, just to show them, I'll sail to Ka-Troo And Bring Back an It-Kutch a Preep and a Proo A Nerkle a Nerd and a Seersucker, too!"

    February 28, 2009

  • Definition #2: ???

    June 30, 2008

  • O WeirdNet, what level of significance must a nerd attain to cease to qualify as one?

    June 29, 2008

  • First coined by Dr. Seuss in "If I ran the Zoo".

    May 7, 2008

  • Word, Bird
    You're a Nerd.

    July 20, 2007

  • My favorite words all rhyme: word, nerd and bird.

    December 30, 2006