side

A bounding straight edge of a two-dimensional shape.

A square has four sides.

A flat surface of a three-dimensional object; a face.

A cube has six sides.

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.

We expressed our readiness, and in ten minutes were in the station wagon, rolling rapidly down the long drive, for it was then after nine.[…]As we reached the lodge we heard the whistle, and we backed up against one side of the platform as the train pulled up at the other.

A region in a specified position with respect to something.

Meet me on the north side of the monument.

Orion hit a rabbit once; but though sore wounded it got to the bury, and, struggling in, the arrow caught the side of the hole and was drawn out. Indeed, a nail filed sharp is not of much avail as an arrowhead; you must have it barbed, and that was a little beyond our skill.

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.

Meronyms: flank, loin; latus, lumbus

I generally sleep on my side.

Being on the left or right, or toward the left or right; lateral.

One mighty squadron with a side wind sped.

Indirect; oblique; incidental.

a side issue; a side view or remark

The law hath no side respect to their persons.

To ally oneself, be in an alliance, usually with "with" or rarely "in with"

Which will you side with, good or evil?

All rising to great place is by a winding star; and if there be factions, it is good to side a man's self, whilst he is in the rising, and to balance himself when he is placed.

To lean on one side.

To be or stand at the side of; to be on the side toward.

His blind eye that syded Paridell.

To suit; to pair; to match.

1660-1667, Edward Hyde, 1st Earl of Clarendon, The Life of Edward Earl of Clarendon He had ure read more , and carried more about him , in his excellent Memory , than any Man I ever knew , my Lord Falkland only excepted , who I think ided him

To work (a timber or rib) to a certain thickness by trimming the sides.