Definition of flag:

part of speech: noun

A piece of cloth on which is wrought some device, usually set upon a staff to wave in the wind; the ensign or colours of a regiment, ship, & c.

part of speech: verb

To lay with broad flat stones.

part of speech: noun

A broad flat stone used for pavements.

part of speech: noun

A plant which grows in marshy places, having large- bladed or sword- shaped leaves; the sedge or iris.

part of speech: verb

To grow spiritless or dejected; to lose vigour; to droop.