<p><strong>Preposition</strong></p><ul><li>On the inner side or part of; within: inside the envelope.</li><li>Inside the circle; inside the envelope.</li><li>Prior to the elapse of; within: He promised to arrive inside an hour.</li></ul><p><strong>Adverb</strong></p><ul><li>In or into the inner part: Please go inside.</li><li>Indoors: They play inside on rainy days.</li><li>Within one's heart, reason, etc.; by true nature; fundamentally: I know inside that he's not guilty. Inside, she's really very shy.</li><li>Slang: In prison.</li></ul><p><strong>Noun</strong></p><ul><li>The inner or internal part; interior: the inside of the house.</li><li>Antonyms: exterior, outside.</li><li>The inner side or surface: He pinned the money to the inside of his jacket.</li><li>The inside of the hand: He pinned the money to the inside of his jacket.</li><li>Insides: A select or inner circle of power, prestige, etc.: a man on the inside.</li><li>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.</li><li>The inward nature, mind, feelings, etc.</li><li>Slang: Confidential or secret information.</li><li>An inside passenger or place in a coach, carriage, etc.</li></ul><p><strong>Adjective</strong></p><ul><li>Situated or being on or in the inside; interior; internal: an inside seat.</li><li>Acting, employed, done, or originating within a building or place: He used to work on the dock but now he has an inside job.</li><li>Derived from the inner circle of those concerned in and having private knowledge of a situation: inside information.</li><li>Baseball: (of a pitched ball) passing between home plate and the batter: The pitch was low and inside.</li></ul>