noun | adjective | preposition, adverb
insideinside1 /ɪnˈsaɪd/ noun 
► the inside the inner part of something, which is surrounded or hidden by the outer part: The inside of the tree was hollow. The door had been locked from the inside and I couldn't open it.
► interior the inside of a building or car: The interior of the apartment was dark. The car has a leather interior.
► core AWL the central part of something, especially of a planet or of fruits such as apples: Remove the cores and bake the apples for 40 minutes. The Earth's core was formed billions of years ago.
ANTONYMS ➔ see outside2 noun | adjective | preposition, adverb
insideinside2 /ɪnˈsaɪd/ adjective ► inside in or on the part of something that is not the outside: He keeps his money in the inside pocket of his jacket.
► internal AWL inside someone's body or a building: She suffered serious internal injuries as a result of the accident. The internal walls are painted white.
► interior inside a building: Leave the interior doors open to allow air to move around the house.
► inner close to the middle of something: The inner part of this type of orange is a surprising red color.
► innermost (formal) farthest inside: They went down into the innermost depths of the cave.
ANTONYMS ➔ see outside1 noun | adjective | preposition, adverb
insideinside3 preposition, adverb ➔ see in