Entry 2 senses · 2 variants Webster, 1913 Straightness · Straight·ness · IPA n. n. 01 n. The quality, condition, or state, of being straight; as, the straightness of a path. 1. The quality, condition, or state, of being straight; as, the straightness of a path. 02 n. A variant of Straitness. 1. A variant of Straitness. See: Straitness