1. The word "column" can have various meanings depending on the context, such as in mathematics, data tables, or architecture. 2. If you meant a column in a table, it is a vertical set of data entries or values arranged one under another. 3. In matrices, a column is a vertical line of entries; for example, a matrix $$A$$ with elements $$a_{ij}$$ has columns indexed by $$j$$. 4. If you meant a different kind of column or a mathematical problem related to columns, please clarify for detailed explanation or solution.