¹ inside noun

• an inner side, edge, or surface of something—usually singular —often + of
• an inner part of something (such as a building or machine) —often plural
• the inner parts (such as the heart and stomach) of a person's body—usually plural

² inside adjective

• located on or near the inner side, edge, or surface of something
• coming from someone within a group or organization : relating to or having information that is known only to a special group of people
• done by someone within a group or organization

³ inside preposition

• in or into the inner part of (something or someone)
• within the borders or limits of (something)
• before the end of (a period of time)

⁴ inside adverb

• in the inner part of something
• in or into the inner part of a building, room, etc.
• in prison