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ack.

 - 2 dictionary results
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Abbreviations & Acronyms
ack.
  1. acknowledge

  2. acknowledgment

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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