INSIDE

noun

1. The interior or inner part.
2. The left-hand side of a road if one drives on the left, or right-hand side if one drives on the right.
3. The side of a curved road, racetrack etc. that has the shorter arc length; the side of a racetrack nearer the interior of the course or some other point of reference.

adjective

1. Of or pertaining to the inner surface, limit or boundary.
2. Nearer to the interior or centre of something.
3. Originating from, arranged by, or being someone inside an organisation.

adverb

1. Within or towards the interior of something; within the scope or limits of something (a place), especially a building.
2. Indoors.
3. Intimately, secretly; without expressing what one is feeling or thinking.