Definitions from Wiktionary (column)

▸ noun:  (architecture) A solid upright structure designed usually to support a larger structure above it, such as a roof or horizontal beam, but sometimes for decoration.
▸ noun:  A vertical line of entries in a table, usually read from top to bottom.
▸ noun:  A body of troops or army vehicles, usually strung out along a road.
▸ noun:  A body of text meant to be read line by line, especially in printed material that has multiple adjacent such on a single page.
▸ noun:  A unit of width, especially of advertisements, in a periodical, equivalent to the width of a usual column of text.
▸ 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.
▸ noun:  Something having similar vertical form or structure to the things mentioned above, such as a spinal column.
▸ noun:  (botany) The gynostemium
▸ noun:  chemistry An instrument used to separate the different components of a liquid or to purify chemical compounds.

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