[[t]ʃ'ʊʃ, ʃʌ̱ʃ[/t]]
shushes, shushing, shushed
1) CONVENTION You say shush when you are telling someone to be quiet.

Shush! Here he comes. I'll talk to you later.

2) VERB If you shush someone, you tell them to be quiet by saying `shush' or `sh', or by indicating in some other way that you want them to be quiet.

[V n] Frannie shushed her with a forefinger to the lips. [Also V]

English dictionary. 2008.