What is the shape of a trapezoid?

In North American usage, a trapezoid is a four-sided figure with two parallel sides. Outside of North America, the same figure is called a trapezium.

In general usage, the name is applied only to figures that have exactly two parallel sides. Figures that have two pairs of parallel sides are called by their more-specific name, e.g. parallelogram, rectangle, etc. depending on their angles and side lengths.