of necessity

of necessity idiom
Also, out of necessity. As an inevitable consequence, unavoidably, as in the New Testament: “Of necessity he must release one unto them at the Feast” (Luke 23:17). [Late 1300s]

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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