Definition of have it in one
: to have the ability (to do something) : be capable (of something) His last performance was wonderful; I didn't know he had it in him! I don't think she has it in her to be cruel. —also have gotI don't think she's got it in her to be cruel.
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
Ask the Editors