Straight  —adj. 1 extending uniformly in the same direction; not bent or curved. 2 successive, uninterrupted (three straight wins). 3 ordered; level; tidy (put things straight). 4 honest, candid. 5 (of thinking etc.) Logical. 6 (of theatre, music, etc.) Serious, classical, not popular or comic. 7 a unmodified. B (of a drink) undiluted. 8 colloq. A (of a person etc.) Conventional, respectable. B heterosexual. 9 direct, undeviating. —n. 1 straight part, esp. The concluding stretch of a racetrack. 2 straight condition. 3 sequence of five cards in poker. 4 colloq. Conventional person; heterosexual. —adv. 1 in a straight line; direct. 2 in the right direction. 3 correctly.  go straight (of a criminal) become honest. Straight away immediately. Straight off colloq. Without hesitation.  straightish adj. Straightness n. [originally a past part. Of *stretch]