Straighten \Straight"en\, v. t. [imp. & p. p. {Straighted}; p. pr. & vb. n. {Straighting}.] 1. To make straight; to reduce from a crooked to a straight form. [1913 Webster] 2. To make right or correct; to reduce to order; as, to straighten one's affairs; to straighten an account. [1913 Webster] {To straighten one's face}, to cease laughing or smiling, etc., and compose one's features. [1913 Webster]