hush down

1. To become quiet and still. The auditorium hushed down as the conductor took the stage. OK, kids, please hush down so I can start the movie. Would you hush down? I can't eavesdrop with you yapping in my ear!

2. To cause, command, or instruct someone or some group to become quiet. In this usage, a noun or pronoun can be used between "hush" and "down." The teacher slammed the ruler against the desk, which hushed down the classroom immediately. The child sat screaming in her seat, with her parents trying anything they could think of to hush her down. Alicia seemed to be panicking, so I didn't try to hush her down. Instead, I just held her and reminded her that everything would be OK.