n. A polyhedron with six faces; the regular hexahedron is more commonly called the cube and is one of the Platonic solids.
the GNU version of the Collaborative International Dictionary of English
n. A solid body of six sides or faces.
The Century Dictionary and Cyclopedia
n. A solid body having six faces; especially, the regular hexahedron or cube. Also hexaëdron.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. any polyhedron having six plane faces
Word Usage
"Plato, the dialectician, condescended to allow to God the liberty of making five worlds; because, said he, there are five regular solids in geometry, the tetrahedron, the cube, the hexahedron, the dodecahedron, and the icosahedron."