Webster's Revised Unabridged Dictionary · 1913

Brood

Brood (brod) , noun

[Old English brod, Anglo-Saxon brōd; akin to Dutch broed, Old High German bruot, German brut, and also to German bruhe broth, Middle High German brueje, and perh. to English brawn, breath. Compare Breed, transitive verb]

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.
Collocations (1)
To sit on brood , to ponder. [Poetic] — Shakespeare

Brood , adjective

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 (brōch) , intransitive verb

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 (brod) , transitive verb

1.
To sit over, cover, and cherish; as, a hen broods her chickens.
2.
To cherish with care. [Rare]
3.
To think anxiously or moodily upon.
You'll sit and brood your sorrows on a throne. — Dryden