a three-dimensional geometric figure with a square base and four triangular sides that connect at one point; a pyramid with a square base
The Great Pyramid of Giza is an example of a square pyramid.
At the end of the building is the royal tomb, consisting of a square pyramid and containing the body of Imandes.
A stick of timber is in the shape of the frustum of a square pyramid, the lower base being 22 in.
A square pyramid is placed on the top of the tower, and the whole is suitably coloured.
As this number is the square of 70, we can lay out the balls in a square, and can form a square pyramid with them.