straight

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Extending continuously in the same direction without curving.
• adjective Having no waves or bends.
• adjective Not bent or bowed; rigid or erect.
• adjective Sports Of or relating to a midair position in diving or gymnastics in which the body is held rigid without bending at the hips or knees and the feet are kept together.
• adjective Perfectly horizontal or vertical; level or even.
• adjective Direct and candid.
• adjective Following a direct or correct method or approach; systematic.
• adjective Coming from a reliable source; factual.
• adjective Showing or marked by honesty or fair-mindedness.
• adjective Right; correct.
• adjective Neatly arranged; orderly.
• adjective Uninterrupted; consecutive.
• adjective Having the parts or details in correct sequence.
• adjective Games Constituting a straight in poker.
• adjective Characterized by undeviating support, as of a principle or a political party.
• adjective Not deviating from what is considered socially normal, usual, or acceptable; conventional.
• adjective Conventional to an extreme degree.
• adjective Heterosexual.
• adjective Slang Not being under the influence of alcohol or drugs.
• adjective Not deviating from the normal or strict form.
• adjective Not altered, embellished, or modified.
• adjective Concerned with serious or important matters.
• adjective Of or relating to a straight man.
• adjective Not mixed with anything else; undiluted.
• adjective Sold without discount regardless of the amount purchased.
• adverb In a straight line; directly.
• adverb In an erect posture; upright.
• adverb Sports In the straight position, as in diving.
• adverb Without detour or delay.
• adverb Without circumlocution; candidly.
• adverb In a neat and orderly condition.
• adverb In an honest, law-abiding, or virtuous manner.
• adverb Without stopping; continuously.
• adverb Without embellishment or modification.
• adverb Without ice, water, or a mixer.
• noun The straight part, as of a road.
• noun The straight part of a racecourse between the winning post and the last turn.
• noun A straight line.
• noun A straight form or position.
• noun Games A poker hand containing five cards of various suits in numerical sequence, ranked above three of a kind and below a flush.
• noun A conventional person, especially one considered a member of established society.
• noun A heterosexual person.