Emily Dickinson Lexicon

DI-MEN'SION, n. [L. dimensio, from dimetior, to measure; di or dis and metior, to mete; Gr. μετρεω. See Mete and Measure.]

In geometry, the extent of a body, or length, breadth and thickness or depth. A line has one dimension or length; a superficies has two dimensions, length and breadth; and a solid has three dimensions, length, breadth and thickness or depth. The word is generally used in the plural, and denotes the whole space occupied by a body, or its capacity, size, measure; as, the dimensions of a room, or of a ship; the dimensions of a farm, of a kingdom, &c.