
I believe offering chocolate to someone
falls within the DEFINITION of "nice."
The Big Bang Theory Season 3, Episode 3

"A thief is, by DEFINITION,
an inveterate optimist.
Money Heist Season 1, Episode 4

That is not the DEFINITION of professional.
The Big Bang Theory Season 2, Episode 14

It's interesting but isn't ventriloquism
by DEFINITION a solo activity?
The Big Bang Theory Season 2, Episode 13

That is the DEFINITION of conspiracy.
Game of Thrones Season 7, Episode 7