General English

  • noun one of the four parts which with the top and bottom make a solid object such as a box
  • noun one of the two parts which with the front and back make a building
  • noun one of the surfaces of a flat object
  • noun one of two parts separated by something
  • noun a sports team
  • noun the part of the body between the top of the legs and the shoulder

General Science

  • suffix
    (written as -side)
    side or edge


  • noun a part of something near the edge

Information & Library Science

  • noun one surface of something flat such as a tape or piece of paper

Media Studies


  • noun the part of an object which is not the front, back, top or bottom


  • noun a vertical surface of an object
  • noun one of two opposing states or alliances, which are involved in a war or conflict

Origin & History of “side”

The etymological meaning of side appears to be the ‘long’ surface of something (as opposed to the ends or the top or bottom, which are the ‘shorter’ or ‘narrower’ surfaces). The word goes back, together with German seite, Dutch zijde, Swedish sida, and Danish side, to a prehistoric Germanic *sīthō, which was probably derived from the adjective *sīthaz ‘long, deep, low’ (source of Swedish sid ‘long’).