Sweater (noun)

1. A knitted garment worn on the upper body.
2. A person or thing that sweats.

Origin:

Late 19th century: from sweat (verb) + -er.

Examples:

1. I put on my warm sweater before going outside.
2. He was wearing a sweater with a reindeer design on it.
3. She had to put a sweater on her dog because he was cold.
4. The sweater was stretched out of shape after being worn so much.
5. I took off my sweater because I was too hot.