Definition of "keep down"

keep down

verb
third-person singular simple present keeps down, present participle keeping down, simple past and past participle kept down
1. (transitive) To repress.
2. (transitive) To restrain or control (a sound).
3. (transitive) To cause not to increase or rise.
4. (transitive) To retain in the stomach without vomiting.
5. (intransitive) To lie low. To stay concealed by not standing up