What does the word hush mean?

Usage examples for hush

  1. The breathless hush of evening lay upon the valley. – The Law-Breakers by Ridgwell Cullum
  2. Hush, or the servants will hear. – Dreamers of the Ghetto by I. Zangwill
  3. Hush- I think Ruth is coming! – When Ghost Meets Ghost by William Frend De Morgan