<p><strong>Adjective</strong></p><ul><li>without a bend, angle, or curve; not curved; direct: a straight path.</li><li>exactly vertical or horizontal; in a perfectly vertical or horizontal plane: a straight table.</li><li>having no means of closing or barring: an open portico.</li><li>honest, honorable, or upright, as conduct, dealings, methods, or persons.</li><li>right or correct, as reasoning, thinking, or a thinker.</li><li>continuous or unbroken: in straight succession.</li><li>supporting or cast for all candidates of one political party: to vote a straight ticket.</li><li>unmodified or unaltered: a straight comedy.</li><li>without change in the original melody or tempo: She does straight songs.</li><li>free from using narcotics.</li><li>not engaged in crime; law-abiding; reformed.</li><li>noting the part of the sea beyond headlands or enclosing areas of land: to sail on the open seas.</li><li>free from ice, as a body of water or a seaport.</li><li>free from navigational hazards: an open coast.</li><li>(of a microphon) in operation; live.</li><li>(of a vowel) articulated with a relatively large opening above the tongue or with a relatively large oral aperture.</li><li>Mathematics: (of an interval) containing neither endpoint.</li></ul><p><strong>Adverb</strong></p><ul><li>in a straight line: to walk straight.</li><li>directly: to go straight to a place.</li><li>without circumlocution; frankly; candidly.</li></ul><p><strong>Noun</strong></p><ul><li>a straight line.</li><li>a straight part, as of a racecourse.</li><li>a person who is free from narcotics.</li></ul>