Brood has multiple meanings depending on the context. Here are some of the definitions of brood:

• Young animals: Brood refers to the young of an animal or a family of young, especially the young of a bird or insect hatched or cared for at one time. For example, a hen with her brood of chicks.

• Group of offspring: Brood can also refer to a group of offspring, such as a family of children. For instance, "Were taking the whole brood to the movies tonight."

• Incubation: Brood is what a bird does when it sits on its eggs to hatch them.

• Meditation: Brood can also mean to think moodily or anxiously about something. For example, "He brooded over his mistake."

• Beekeeping: In beekeeping, brood refers to the eggs, larvae, and pupae of honeybees. Bee brood frames are composed of brood at various stages of development - eggs, larvae, and pupae.

In summary, brood can refer to young animals, a group of offspring, incubation, meditation, or beekeeping.