two-by-four

[too-bahy-fawr, -fohr, -buh-]

adjective

1. two units thick and four units wide, especially in inches.

2. Informal.,  lacking adequate space; cramped.

   a small, two-by-four room.

3. Informal.,  unimportant; insignificant.

   Theirs was a petty, two-by-four operation.

noun

1. a timber measuring 2 × 4 inches (5 × 10 centimeters) in cross section, when untrimmed: equivalent to 1 5/8 × 3 5/8 inches (4.5 × 9 centimeters) when trimmed.

two-by-four

noun

1. a length of untrimmed timber with a cross section that measures 2 inches by 4 inches

2. a trimmed timber joist with a cross section that measures 1 1/ 2 inches by 3 1/ 2 inches

Word History and Origins

Origin of two-by-four¹

An Americanism dating back to 1880–85

Related Words

• girder 
• joist 
• piling 
• pillar 
• plank 
• pole 
• shaft 
• sill 
• timber