if

1. conjunction

1)

if the rain holds off, we can walk

Syn:

on (the) condition that, provided (that), providing (that), presuming (that), supposing (that), assuming (that), as long as, given that, in the event that

2)

if I miss curfew, she lays down the law

Syn:

whenever, every time

3)

a useful, if unintended innovation

Syn:

although, albeit, but, yet, while; even though, despite being; chiefly Brit. whilst

2. noun

there is one if in all this

Syn:

uncertainty, doubt; condition, stipulation, provision, proviso, constraint, precondition, requirement, specification, restriction