draw the curtain
1
Pull a curtain back or to one side to let in more light or to discover what is behind it. For example, The sun was so pleasant I drew the curtains. [c. 1500]
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2
Block or conceal something. For example, Let's draw the curtain over this matter; no one needs to know more. [c. 1500] Also see draw a veil.
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The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.