n The interior or inner part.
n The left-hand side of a road if one drives on the left, or right-hand side if one drives on the right.
n 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.
n (colloquial, in the plural) The interior organs of the body, especially the guts.
n (dated, UK, colloquial) A passenger within a coach or carriage, as distinguished from one upon the outside.
n (slang) The inside scoop; information known only to certain involved people.
adj Of or pertaining to the inner surface, limit or boundary.
adj Nearer to the interior or centre of something.
adj Originating from, arranged by, or being someone inside an organisation.
adj (of a person) Legally married to or related to (e.g. born in wedlock to), and/or residing with, a specified other person (parent, child, or partner); (of a marriage, relationship, etc) existing between two such people.
adj (baseball, of a pitch) Toward the batter as it crosses home plate.
adj At or towards or the left-hand side of the road if one drives on the left, or right-hand side if one drives on the right.
adv Within or towards the interior of something; within the scope or limits of something (a place), especially a building.
adv (colloquial) In or to prison.
adv Indoors.
adv Intimately, secretly; without expressing what one is feeling or thinking.