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freeboard deck

American  

noun

Nautical.

  1. (on a cargo vessel) the uppermost deck officially considered to be watertight: used as the level from which the Plimsoll marks are measured.

Etymology

Origin of freeboard deck

First recorded in 1950–55

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.