by reason of

by reason of idiom
Because of, owing to, as in By reason of a crop failure, the price of coffee is bound to rise. This expression is considered quite formal today. [c. 1300]

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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