an upright pillar, typically cylindrical, supporting an arch, entablature, or other structure or standing alone as a monument

a wide entrance portico of eight Ionic columns

the pulpit is hexagonal and stands on seven columns

a vertical division of a page or text

turn to page five, column seven

detail your expenses in the left-hand column

one or more lines of people or vehicles moving in the same direction

a column of tanks moved north-west

we walked in a column