SIDE

noun

1. A bounding straight edge of a two-dimensional shape.
2. A flat surface of a three-dimensional object; a face.
3. One half (left or right, top or bottom, front or back, etc.) of something or someone.

verb

1. To ally oneself, be in an alliance, usually with "with" or rarely "in with"
2. To lean on one side.
3. To be or stand at the side of; to be on the side toward.

adjective

1. Being on the left or right, or toward the left or right; lateral.
2. Indirect; oblique; incidental.