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

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

(intransitive) To ally oneself, be in an alliance, usually with "with" or rarely "in with" / To lean on one side. / (transitive, obsolete) To be or stand at the side of; to be on the side toward.

(UK archaic, dialectal, Northern England, Scotland) Wide; large; long, pendulous, hanging low, trailing; far-reaching. / (Scotland) Far; distant.

(UK dialectal) Widely; wide; far.

To clear, tidy or sort.

Of or relating to the stars. / (astronomy) Relating to a measurement of time relative to the position of the stars.

Of a garment, etc, having its inner or hidden side on the outside and vice versa. / (figuratively) Reversed, changed diametrically, by analogy with a garment that is wrong side out.

plural of sideway

Moving or directed toward one side. / (informal) Positioned sideways (with a side to the front). / (informal) Neither moving upward nor moving downward.