1. (noun)parallelogram a quadrilateral whose opposite sides are both parallel and equal in length
Definitions of 'parallelogram'
Webster 1913 Dictionary
1. (noun)parallelogram 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
Definition of parallelogram 
