- a timber forming the upper, straighter portion of a frame in a wooden hull.
Origin of top timber
First recorded in 1620–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for top timber
In naval architecture, a name for the fifth or top-timber sweep (which see).
A name sometimes given to the back sweep which forms the upper part of the top-timber.