<p><strong>Noun</strong></p><ul><li>Geometry: a quadrilateral plane figure having two parallel and two nonparallel sides.</li><li>Anatomy: a bone in the wrist that articulates with the metacarpal bone of the forefinger.</li><li>British: trapezium (def 1b).</li></ul><p><strong>Adjective</strong></p><ul><li>Also trapezoidal: of, relating to, or having the form of a trapezoid.</li></ul>