1. A heated enclosure for raising young birds, especially chicks.

   1. The chicks stay in the brooder to keep warm.
   2. The farmer checked the brooder to ensure the chicks had enough food and water.

2. A person who spends a lot of time thinking about unpleasant things.

   1. He is such a brooder, always worrying about something.
   2. She was known as a brooder, often lost in thought and rarely smiling.

1. To think deeply about something that makes one unhappy.

   1. Don't brooder; you'll feel better soon.
   2. It is not healthy to brooder too much about past mistakes; try to move on.

2. To sit on eggs to hatch them (of a bird).

   1. The hen will brooder her eggs until they hatch.
   2. The mother bird started to brooder, carefully keeping her eggs warm and protected.

1. To think anxiously or gloomily about something.

   1. She would brooder over the problem all night.
   2. He tends to brooder about his failures, rather than learning from them and improving.