size up

verb

sized up; sizing up; sizes up
Synonyms of size upnext

transitive verb

: to form a judgment of
size up the situation

Word History

First Known Use

1884, in the meaning defined above

Time Traveler
The first known use of size up was in 1884

Browse Nearby Words

Cite this Entry

“Size up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/size%20up. Accessed 17 Jan. 2026.

More from Merriam-Webster on size up

Love words? Need even more definitions?

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