migrating, especially of people; migratory. noun. 2. a person or animal that migrates. 3. a person who attempts to permanently relocate to a new country, but who may be subject to removal by the government of that country: undocumented migrants; unaccompanied child migrants. Compare immigrant.
Definition: Columns are a fundamental part of any spreadsheet program such as Excel and Google Spreadsheets. Columns run vertically in a worksheet. Each column is identified by a letter in the column header starting with Column A and running through to Column XFD.
Well, the straight forward idea is that a column is the vertical part of a matrix and a row is the horizontal part. It's very common that a row is a single element of your data and a column a feature/attribute of your element. It's simple, in an excel sheet on left side of your screen you will see verticle numbers 1,2,3 and so on that are rows and on the top of the screen you will see horizontal A,B,C and so on these are columns.