cover up

cover up idiom
  1. Wrap up or enfold in order to protect. For example, Be sure to cover up the outdoor furniture in case of rain, or It's cold, so be sure to cover up the baby. [Late 1800s]
  2. Conceal something, especially a crime, as in The opposition accused the President of covering up his assistant's suicide. [c. 1920]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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