building lumber cut to standard or specified sizes.
sawed lumber from 2 to 5 inches (5 to 12.7 cm) thick and from 4 to 12 inches (10.2 to 30.5 cm) wide.
Origin of dimension lumber
First recorded in 1870–75
Also called dimension.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019