keep in = make someone stay inside (at home, at school, in hospital etc)
- Mum kept me in yesterday because I hadn ‘t done my homework.
- The teacher said that if anybody makes too much noise in class, she will keep him in during recess as a punishment.
- Tommy was kept in after school again.
- He wasn ‘t feeling very well, so his mother kept him in.
- The doctors are keeping him in to run more tests.
- She was feeling alright but the doctors kept her in as a precaution.
- I kept in during the storm.
- She kept in during her husband ‘s illness.
- I kept in for a long time after my mother ‘s death.
- Don ‘t keep the children in just because it ‘s cold. Just dress them up in thick jackets and scarfs and let them play in the snow.