The silent film-making industry

to become quiet

(business) The execution of business transactions between electronic devices or systems without human interaction.

A property available for sale, but not publicly advertised or widely promoted.

In a state of radio silence.

Synonym of dog whistle

plural of silent whistle

A physically strong man of action who is quiet and emotionally reserved.

plural of strong silent type

A situation, common in Asia, in which an area of intact habitat no longer has birdsong as a result of having had all songbirds trapped out for the cagebird trade.