Available Definitions:
1) n. - A pavement or sidewalk of flagstones; flagstones, collectively.
2) a. - Growing languid, weak, or spiritless; weakening; delaying.
3) v. t. - To let droop; to suffer to fall, or let fall, into feebleness; as, to flag the wings.
4) v. t. - To enervate; to exhaust the vigor or elasticity of.
5) n. - That which flags or hangs down loosely.
6) n. - A cloth usually bearing a device or devices and used to indicate nationality, party, etc., or to give or ask information; -- commonly attached to a staff to be waved by the wind; a standard; a banner; an ensign; the colors; as, the national flag; a military or a naval flag.
7) n. - A group of feathers on the lower part of the legs of certain hawks, owls, etc.
8) n. - A group of elongated wing feathers in certain hawks.
9) n. - The bushy tail of a dog, as of a setter.
10) v. t. - To signal to with a flag; as, to flag a train.
11) v. t. - To convey, as a message, by means of flag signals; as, to flag an order to troops or vessels at a distance.
12) n. - An aquatic plant, with long, ensiform leaves, belonging to either of the genera Iris and Acorus.
13) v. t. - To furnish or deck out with flags.
14) n. - A flat stone used for paving.
15) n. - Any hard, evenly stratified sandstone, which splits into layers suitable for flagstones.
16) v. t. - To lay with flags of flat stones.