- 1muffle something to make a sound quieter or less clear He tried to muffle the alarm clock by putting it under his pillow.
- 2muffle somebody/something (up) in something to wrap or cover someone or something in order to keep them/it warm She muffled the child up in a blanket.
NAmE//ˈmʌfl//Verb Forms present simple I / you / we / they muffle
he / she / it muffles
past simple muffled
-ing form muffling