1. (noun)column a line of units following one after another
2. (noun)column, chromatography column a vertical glass tube used in column chromatography; a mixture is poured in the top and washed through a stationary substance where components of the mixture are adsorbed selectively to form colored bands
3. (noun)column a vertical array of numbers or other information
"he added a column of numbers"
4. (noun)column, tower, pillar anything that approximates the shape of a column or tower
"the test tube held a column of white powder"; "a tower of dust rose above the horizon"; "a thin pillar of smoke betrayed their campsite"
5. (noun)column, editorial, newspaper column an article giving opinions or perspectives
6. (noun)column, pillar a vertical cylindrical structure standing alone and not supporting anything (such as a monument)
7. (noun)column, pillar (architecture) a tall vertical cylindrical structure standing upright and used to support a structure
8. (noun)column a page or text that is vertically divided
"the newspaper devoted several columns to the subject"; "the bookkeeper used pages that were divided into columns"
9. (noun)column any tubular or pillar-like supporting structure in the body