what is a flag
flag 1. 1. a typically rectangular piece of cloth marked with distinctive colors or designs and used as a symbol, as of a nation or organization, or as a means of signaling. 2. the tail of a deer or of a setter dog. 3. a tab or tag attached, as to a page, to attract attention. piece of cloth, usually rectangular, of distinctive color and design, used as a symbol, standard, signal, or emblem. 2. National or other allegiance, as symbolized by a flag: ships of the same flag. 3. A ship carrying the flag of an admiral; a flagship.