Abbreviation for "super sonic transport," a type of aircraft designed for supersonic flight.

A shorthand or slang for "sst" as in a quick or soft sound.

जल्दी या मुलायम आवाज के लिए संक्षेप।

English Usage: The music played a gentle sst that filled the quiet room.

Hindi Usage: संगीत ने शांति से भरे कमरे में एक हल्की sst बजाई।