keep someone or something still
1. Lit. and keep someone Or something quiet to make someone or something silent or less noisy. Can you please keep the baby still? Keep that stereo quiet!
2. Go to keep something quiet.
3. and hold someone or something still Fig. to restrain or control someone or something so that the person or thing cannot move. Please keep your foot still. It makes me nervous when you wiggle it. You have to hold the nail still if you want to hit it.
Keep still.
1. and Hold Still. Do not move. Quit wiggling. Keep still! "Hold still. I can't examine your ear if you're moving," said the doctor.
2. Go to keep quiet (about someone or something).
keep still
(for someone or something) Go to hold still (for someone or something).