Real Dictionary

flag
Journalists sometimes refer to the flag of a particular country or organization as a way of referring to the country or organization itself and its values or power.
countable noun: A flag is a piece of cloth which can be attached to a pole and which is used as a sign, signal, or symbol of something, especially of a particular country.
countable noun: A flag is a small piece of paper or cloth attached to a stick or pin which is sold on a flag day or used to mark a particular spot.
countable noun: A flag is the same as a flagstone.
verb: If you flag or if your spirits flag, you begin to lose enthusiasm or energy.

flag in American English 1
a piece of cloth or bunting, often attached to a staff, with distinctive colors, patterns, or symbolic devices, used as a national or state symbol, as a signal, etc.; banner; standard; ensign
to decorate or mark with flags
noun: a piece of cloth, varying in size, shape, color, and design, usually attached at one edge to a staff or cord, and used as the symbol of a nation, state, or organization, as a means of signaling, etc.; ensign; standard; banner; pennant

flag in American English 2
to become limp; droop
noun: any of various plants with long, sword-shaped leaves, as the sweet flag

flag in American English 3
flagstone
intransitive verb: to fall off in vigor, energy, activity, interest, etc.

flag in American English 4
any of various wild irises with flat fans of sword-shaped leaves and white, blue, or yellow flowers
noun

flag in British English 1
noun: a piece of cloth, esp bunting, often attached to a pole or staff, decorated with a design and used as an emblem, symbol, or standard or as a means of signalling

flag in British English 2
verb: to hang down; become limp; droop

flag in British English 3
noun: any of various plants that have long swordlike leaves, esp the iris Iris pseudacorus (yellow flag)

flag in British English 4
noun
verb: to furnish (a floor) with flagstones