parallelogram [parallelograms]◼◼◼(convex quadrilateral in which each pair of opposite edges are parallel and of equal length) noun [UK: ˌpæ.rə.ˈle.lə.ɡræm] [US: ˌpæ.rə.ˈle.lə.ɡræm]The opposite sides of a parallelogram are parallel. = Les côtés opposés d'un parallélogramme sont parallèles.