the actions and activities assigned to or required or expected of a person or group
what something is used for
an actor's portrayal of someone in a play
normal or customary activity of a person in a particular social setting
a small concavity
an enclosure that is set back or indented
(ecology) the status of an organism within its environment and community (affecting its survival as a species)
a position particularly well suited to the person who occupies it
