- (British English) (North American English trapezium)
a flat shape with four straight sides, none of which are parallel (= the same distance apart at every point) 不规则四边形 
- (North American English) (British English trapezium)
a flat shape with four straight sides, one pair of opposite sides being parallel (= the same distance apart at every point) and the other pair not parallel 梯形 
Word Originearly 18th cent.: from modern Latin trapezoides, from late Greek trapezoeidēs, from trapeza ‘table’.