Definitions of inside:

• noun:   the inner or enclosed surface of something
• noun:   the region that is inside of something
• adjective:   relating to or being within or near the inner side or limit

  Example: "He reached into his inside jacket pocket"

• adjective:   confined to an exclusive group

  Example: "Inside information"

• adjective:   within some bounds; especially of an organization

  Example: "An inside job"

• adjective:   away from the outer edge

  Example: "The inside lane"

• adjective:   located, suited for, or taking place within a building
• adverb:   within a building

  Example: "In winter we play inside"

• adverb:   on the inside

  Example: "Inside, the car is a mess"

• adverb:   with respect to private feelings
• adverb:   in reality