\Brood\ (br[=oo]d), n. [OE. brod, AS. br[=o]d; akin to D.
broed, OHG. bruot, G. brut, and also to G. br["u]he broth,
MHG. br["u]eje, and perh. to E. brawn, breath. Cf. {Breed},
v. t.]
1. The young birds hatched at one time; a hatch; as, a brood
   of chickens.
         As a hen doth gather her brood under her wings.
                                               --Luke xiii.
                                               34.
         A hen followed by a brood of ducks.   --Spectator.
2. The young from the same dam, whether produced at the same
   time or not; young children of the same mother, especially
   if nearly of the same age; offspring; progeny; as, a woman
   with a brood of children.
         The lion roars and gluts his tawny brood.
                                               --Wordsworth.
3. That which is bred or produced; breed; species.
         Flocks of the airy brood, (Cranes, geese or
         long-necked swans).                   --Chapman.
4. (Mining) Heavy waste in tin and copper ores.
{To sit on brood}, to ponder. [Poetic] --Shak.

\Brood\, a.
1. Sitting or inclined to sit on eggs.
2. Kept for breeding from; as, a brood mare; brood stock;
   having young; as, a brood sow.

\Brood\ (br[=o]ch), v. i. [imp. & p. p. {Brooded}; p. pr.
& vb. n. {Brooding}.]
1. To sit on and cover eggs, as a fowl, for the purpose of
   warming them and hatching the young; or to sit over and
   cover young, as a hen her chickens, in order to warm and
   protect them; hence, to sit quietly, as if brooding.
         Birds of calm sir brooding on the charmed wave.
                                               --Milton.
2. To have the mind dwell continuously or moodily on a
   subject; to think long and anxiously; to be in a state of
   gloomy, serious thought; -- usually followed by over or
   on; as, to brood over misfortunes.
         Brooding on unprofitable gold.        --Dryden.
         Brooding over all these matters, the mother felt
         like one who has evoked a spirit.     --Hawthorne.
         When with downcast eyes we muse and brood.
                                               --Tennyson.

\Brood\ (br[=oo]d), v. t.
1. To sit over, cover, and cherish; as, a hen broods her
   chickens.
2. To cherish with care. [R.]
3. To think anxiously or moodily upon.
         You'll sit and brood your sorrows on a throne.
                                               --Dryden.