side

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side

1. Geometry
a. any line segment forming part of the perimeter of a plane geometric figure
b. another name for face
2. either half of a human or animal body, esp the area around the waist, as divided by the median plane
3. Billiards snooker spin imparted to a ball by striking it off-centre with the cue
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

side

[sīd]
(mathematics)
One of the line segments that bound a polygon.
One of the two rays that extend from the vertex of an angle.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

lee side

The side of a mountain or an island away from the direction from which wind is blowing. On the water, from the observer's viewpoint, the lee is the direction to which the wind is blowing. Also called the leeward (pronounced “loo-ard”) side.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
None of us - me, Strauss or Broady - want to be the skipper who lets the side down.
The brutal Hot Kiss and teasing Rosie Rosie are surprisingly steamy and only maudlin Singing With Angels, a hotch-potch of Presley lyrics, really lets the side down. PC
Caine is brilliant in his supporting role as Borden's voice of reason but Johansson lets the side down with a rather shallow turn that reduces her to little more than love interest.