Noun
1. a line of (usually military) units following one after another
2. 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. a linear array of numbers one above another
4. anything tall and thin approximating 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. an article giving opinions or perspectives
6. a vertical structure standing alone and not supporting anything (as a monument or a column of air)
7. (architeture) a tall cylindrical vertical upright and used to support a structure