used to express farewell

Word History

Etymology

origin unknown

First Known Use

1854, in the meaning defined above

Time Traveler
The first known use of so long was in 1854

Dictionary Entries Near so long

Cite this Entry

“So long.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/so%20long. Accessed 26 May. 2024.

Kids Definition

so long

interjection
used to express good-bye or farewell
Love words? Need even more definitions?

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