noun

1. the right or left half of a human or animal body, esp. either half of the trunk
2. a position or space beside one
3. 1. any of the lines or surfaces that bound or limit something a square has four sides, a cube six
   2. any bounding line or surface of an object other than the ends or top and bottom
   3. either of the two bounding surfaces of an object that are distinguished from the front, back, top, and bottom
4. either of the two surfaces of a thing having no appreciable thickness, as paper, cloth, etc.
5. a surface or part of a surface having a specified aspect the visible side of the moon
6. any aspect or phase as contrasted with another or others his cruel side
7. either of the two lateral surfaces of a ship from stem to stern above the waterline
8. a slope of a hill, bank, etc.
9. the shore of a river or other body of water
10. any location, area, space, direction, etc. with reference to its position in relation to an observer or to a central part, point, or line
11. the action, position, or attitude of one person or faction opposing another my side of the argument
12. one of the parties in a contest, conflict, etc.; faction
13. either of the longitudinal halves of an animal carcass processed for use as meat
14. line of descent through either parent; maternal or paternal lineage
15. any of the pages containing an actor's lines and cues for a role in a play
16. Informal a side dish or side order a side of potato salad
17. Brit., Slang a conceited or pretentious manner
18. Billiards, Brit. English ()

Etymology: ME < OE sīde, akin to Ger seite, side, OE sīd, ample, broad < IE base *sē(i)-, to throw, let fall, reach for, let go, rest > sow

adjective

1. of, at, or on a side or sides a side door
2. to or from one side a side glance
3. made, done, happening, etc. on the side, or incidentally a side effect
4. not of primary importance; secondary a side issue
5. ☆ ordered separately, along with the main dish a side order of cole slaw

transitive verb sided sid′ed, siding sid′·ing

intransitive verb