Pronunciation: ( —prep.in"sīd', in'sīd"; —adv.in"sīd'; —n.in'sīd'; —adj.in"sīd', in'-, in'sīd"),[key] —prep. 1. on the inner side or part of; within: inside the circle; inside the envelope. 2. prior to the elapse of; within: He promised to arrive inside an hour.
—adv. 1. in or into the inner part: Please go inside. 2. indoors: They play inside on rainy days. 3. within one's heart, reason, etc.; by true nature; basically: I know inside that he's not guilty. Inside, she's really very shy. 4. Slang.in prison.
5. inside of,Informal.within the space or period of: Our car broke down again inside of a mile.
—n. 1. the inner or internal part; interior: the inside of the house. 2. the inner side or surface: the inside of the hand; He pinned the money to the inside of his jacket. 3. Usually, insides.Informal.the inner parts of the body, esp. the stomach and intestines: The coffee scalded my insides. 4. a select or inner circle of power, prestige, etc.: a man on the inside. 5. the shortest of several parallel, curving tracks or lanes; the part of an oval track closest to the inner rail: The horse came up fast on the inside. 6. the inward nature, mind, feelings, etc.
7. Slang.confidential or secret information.
8. an inside passenger or place in a coach, carriage, etc.
9. inside out, a. with the inner side reversed to face the outside.
b. thoroughly; completely: She knew the work inside out.
—adj. 1. situated or being on or in the inside; interior; internal: an inside seat. 2. acting, employed, done, or originating within a building or place: He used to work on the dock but now he has an inside job. 3. derived from the inner circle of those concerned in and having private knowledge of a situation: inside information. 4. Baseball.(of a pitched ball) passing between home plate and the batter: The pitch was low and inside.