intransitive. To become straight, to straighten out. Obsolete. rare.

To alter from a bend or curve; to become straight or less curved.

transitive and intransitive. To uncurve; to straighten.

intransitive. To become unfolded or straight.

intransitive. To become straight. to straighten up (originally U.S.): to rise to an erect posture; slang, to adopt an honest course of life; also in…

intransitive. To cease to be kinked; to straighten from a bent or twisted position or state. Also (and in earliest use) figurative.