addition Hear it!

addition definition

ad·di·tion (ə dis̸h′ən)

noun

  1. an adding of two or more numbers to get a number called the sum
  2. a joining of a thing to another thing
  3. a thing or part added; increase; specif., a room or rooms added to a building
  4. Law an identifying title or mark of status after a person's name (Ex.: John Smith, Esq.)

Etymology: ME addicion < OFr addition < L additio < addere: see add

addition Idioms

in addition (to)

besides; as well (as)

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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