Definition Of if
(often used in indirect questions) whether.
he asked if we would like some coffee
a condition or supposition.
there are so many ifs and buts in the policy
despite the possibility that; no matter whether.
if it takes me seven years, I shall do it
expressing a polite request.
if I could trouble you for your names?
expressing an opinion.
that's an awfully long walk, if you don't mind my saying so