wrap(redirected from under wraps)
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1. Brit slang a small package of an illegal drug in powder form
a. the end of a working day during the filming of a motion picture or television programme
b. the completion of filming of a motion picture or television programme
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
In a book or magazine, an insert, usually on a different stock, which is not tipped in but wrapped around one of the signatures, and which usually consists of at least two leaves (four pages) securely stitched into the binding.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.