Definitions
There is 1 meaning of the phrase
If Not.
If Not - as an adverb
Perhaps; indicating possibility of being more remarkable (greater or better or sooner) than
Example: "Will yield 10% if not more"
Example Sentences
"He should be here by now, if not delayed by the traffic."
"She is a talented singer, if not the best in the world."
"I'll be there in an hour, if not sooner."
"He claimed he was innocent, if not mistaken."
"She worked tirelessly, if not tirelessly then with great passion."
