curtain raiser

curtain raiser idiom
Preliminary event, as in This limited attack on the chairman is just a curtain raiser for the concerted effort to oust him. This term literally refers to a short play or skit presented before the main theatrical production. It began to be transferred to other preliminaries about 1940.

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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