from the GNU version of the Collaborative International Dictionary of English.

  • As a prefix ad- assumes the forms ac-, af-, ag-, al-, an-, ap-, ar-, as-, at-, assimilating the d with the first letter of the word to which ad- is prefixed. It remains unchanged before vowels, and before d, h, j, m, v. Examples: adduce, adhere, adjacent, admit, advent, accord, affect, aggregate, allude, annex, appear, etc. It becomes ac- before qu, as in acquiesce.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • prefix near, at.
  • prefix toward, to, tendency, or addition.


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

Latin, from ad, to; see ad- in Indo-European roots.

from Wiktionary, Creative Commons Attribution/Share-Alike License

from the Latin prefix ad-.


  • Gigot: Kim, you know, that's more of a biographical ad-

    The Voting Begins

  • There would have been no ad- vantage at all in informing you of my duplicity, Alleged duplicity, she amended.

    Star Trek® New Frontier

  • Steve Jobs' 1984 Super Bowl ad- were applauded and deemed the essence of entrepreneurial spirit. News

  • But I had read and ad- mired Ballard and Burroughs, and I thought of them as very powerful effect pedals.

    Boing Boing

  • Any amount of listening is now free and ad- supported, a change that may add $53 million in revenue in the next four years, Devitt said in a Sept. 23 report. -- Top News

  • Pandora also faces new competition for listeners' time from Spotify, operator of Europe's biggest online music service, which in July began signing up U.S. customers for its ad- supported and subscription plans, and from Rdio, started by a co-founder of Skype Technologies SA, which on Oct. 6 began offering free music without advertising. -- Top News

  • "Many states have begun ways to ad- dress the unscrupulous agent problem, so perhaps we could work to find a way to create a law to address these other rogue behaviors," he said.

    NYT > Home Page


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