merchant marine
Americannoun
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the vessels of a nation that are engaged in commerce.
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the officers and crews of such vessels.
Etymology
Origin of merchant marine
An Americanism dating back to 1850–55
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.