if not
phrase
1
—used to talk about the negative result or effect of something
You should study. If not, you won't pass the test.
2
—used to express surprise about meeting someone when it is not expected
So I went to the game and who should I see there if not my old friend Tom!
Cite this Entry
“If not.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/if%20not. Accessed 20 Oct. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
