To cherish with care.

To think anxiously or moodily upon.

Sitting or inclined to sit on eggs.

To sit over, cover, and cherish; as, a hen broods her
chickens.

Kept for breeding from; as, a brood mare; brood stock;
having young; as, a brood sow.

Heavy waste in tin and copper ores.

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 young birds hatched at one time; a hatch; as, a brood
of chickens.

That which is bred or produced; breed; species.

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.