What is the meaning of Trapezoid?

A (convex) quadrilateral with two (non-adjacent) parallel sides.

A convex quadrilateral with no sides parallel.

The trapezoid bone of the wrist.

trapezoid (a convex quadrilateral with no sides parallel)

trapezium, trapezoid (quadrilateral with two sides parallel and two sides non-parallel)

trapezoid

trapezium

Source: wiktionary.org