Assuming you mean parallelogram, it's a four sided plane figure with opposite sides parallel. Like a square only with adjacent sides different and no internal right angles.
Rectangle, square, ... anything else?
A rhombus is a parallelogram.
A rhombus is a special case of a parallelogram. A parallelogram has two pairs of equal sides whereas in a rhombus all four are the same length.
No, a trapezoid is usually not a parallelogram. The term trapezoid is usually applied to quadrilaterals with only one pair of parallel sides, not two pairs as required for a parallelogram. Conventionally, the base and top of a trapezoid are parallel to one another but the other two sides are not.
I hope you know the definition of the parallelogram. i.e.,In geometry, a parallelogram is a quadrilateralwith two sets of parallel sides.so naturally rhombus and rectangle are special case of parallelogram. That means every rhombus is parallelogram similarly every rectangle is a parallelogram. But converse need not be true.So parallelogram not necessarily a rhombus or a rectangle.GMG.