Definitions
1.nounA commissioned officer in an armed military organization, typically the highest rank before flag officer ranks (generals). It is generally found in armies, air forces or naval infantry (marines).
2.nounA solid upright structure designed usually to support a larger structure above it, such as a roof or horizontal beam, but sometimes for decoration.
3.nounA vertical line of entries in a table, usually read from top to bottom.
4.nounA body of troops or army vehicles, usually strung out along a road.
5.nounA body of text meant to be read line by line, especially in printed material that has multiple adjacent such on a single page."It was too hard to read the text across the whole page, so I split it into two columns."
6.nounA unit of width, especially of advertisements, in a periodical, equivalent to the width of a usual column of text."Each column inch costs $300 a week; this ad is four columns by three inches, so will run $3600 a week."
7.noun(by extension) A recurring feature in a periodical, especially an opinion piece, especially by a single author or small rotating group of authors, or on a single theme."His initial foray into print media was as the author of a weekly column in his elementary-school newspaper."
8.nounSomething having similar vertical form or structure to the things mentioned above, such as a spinal column.
9.nounThe gynostemium
10.noun(chemistry) An object used to separate the different components of a liquid or to purify chemical compounds.