In architecture, a long round body of wood or stone, used to support or adorn a building, composed of a base, a shaft and a capital. The shaft tapers from the base, in imitation of the stem of a tree. There are five kinds or orders of columns. 1. The Tuscan, rude, simple and massy; the highth of which is fourteen semidiameters or modules, and the diminution at the top from one sixth to one eighth of the inferior diameter. 2. The Doric, which is next in strength to the Tuscan, has a robust, masculine aspect; its highth is sixteen modules. 3. The lonic is more slender than the Tuscan and Doric; its highth is eighteen modules. 4. The Corinthian is more delicate in its form and proportions, and enriched with ornaments; its highth should be twenty modules. 5. The Composite is a species of the Corinthian, and of the same highth. In strictness, the shaft of a column consists of one entire piece; but it is often composed of different pieces, so united, as to have the appearance of one entire piece. It differs in this respect from a pillar, which primarily signifies a pile, composed of small pieces. But the two things are unfortunately confounded; and a column consisting of a single piece of timber is absurdly called a pillar or pile.

An erect or elevated structure resembling a column in architecture; as the astronomical column at Paris, a kind of hollow tower with a spiral ascent to the top; gnomonic column, a cylinder on which the hour of the day is indicated by the shadow of a style; military column, among the Romans; triumphal column; etc.

Any body pressing perpendicularly on its base, and of the same diameter as its base; as a column of water, air or mercury.

In the military art, a large body of troops drawn up in order; as a solid column.

Among printers, a division of a page; a perpendicular set of lines separated from another set by a line or blank space. In manuscript books and papers, any separate perpendicular line or row of words or figures. A page may contain two or more columns; and in arithmetic, many columns of figures may be added.