Word History

Etymology

supersonic transport

First Known Use

1961, in the meaning defined above

Time Traveler
The first known use of SST was in 1961

Dictionary Entries Near SST

Cite this Entry

“SST.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/SST. Accessed 25 Dec. 2024.

Kids Definition

: an airplane used to transport people and goods at supersonic speeds
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!