noun A bounding straight edge of a two-dimensional shape.
A square has four sides.
noun A flat surface of a three-dimensional object; a face.
A cube has six sides.
noun One half (left or right, top or bottom, front or back, etc.) of something or someone.
Which side of the tray shall I put it on? The patient was bleeding on the right side.
noun A region in a specified position with respect to something.
Meet me on the north side of the monument.
noun The portion of the human torso usually covered by the arms when they are not raised; the areas on the left and right between the belly or chest and the back.
I generally sleep on my side.
noun One possible aspect of a concept, person, or thing.
Look on the bright side.
noun One set of competitors in a game.
Which side has kick-off?
noun A group having a particular allegiance in a conflict or competition.