- A small piece of lumber, ordinarily yard lumber, 2" thick and less than 8" wide, or lumber not more than 5" square.
- The dimensions, especially width and thickness, of construction materials such as stone or timber.
- A stud or similar upright framing timber.
- Any hardwood that has been squared, but is not of standard dimensions.
- noun a piece of timber with a small cross section, e.g. a rafter
- noun the dimension of a building material