WordNet sense 1 (anything tall and relatively thin that approximates the shape of a column or tower):

pillar, tower, tower

WordNet sense 2 (an article giving opinions or perspectives):

editorial, newspaper column

WordNet sense 3 (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):

chromatography column