parallelogram Meaning, Definition & Usage

  1. noun a quadrilateral whose opposite sides are both parallel and equal in length

WordNet

Par`al*lel"o*gram noun
Etymology
Gr. parallel + to write: cf. F. parallélogramme. See Parallel, and -gram.
Definitions
  1. (Geom.) A right-lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; -- sometimes restricted in popular usage to a rectangle, or quadrilateral figure which is longer than it is broad, and with right angles.

Webster 1913