(1) In a relational database, a field defined for a given record or row.
(2) The vertical component of a database table. A column has a name and a particular data type (for example, character, decimal, or integer).
(3) A character position within a print line or on a display. The positions are numbered consecutively from 1, starting at the leftmost character position and extending to the rightmost position.
(4) A vertical arrangement of characters or other expressions. Columns are positioned side by side on a page or display. See also row.
(5) A subdivision of a band, such as baseline or actual.