The centre of any activity.
A solution that people will tend to use in the absence of communication, because it seems natural, special, or relevant.
A focus; a point at which rays of light or other radiation converge.
A feature that attracts particular attention.
A centre, midpoint.
The part between the beginning and the end.
The middle stump.
The central part of a human body; the waist.
The middle voice.
Pertaining to the middle voice.
Located in the middle; in between.
Central.