if — OET · Shobdo

conjunction

1 if the weather is fine, we can walk to the village:

on condition that, provided (that), providing (that), presuming (that), supposing (that), assuming (that), on the assumption that, allowing (that), as long as, given that, with the provision/proviso that, with/on the understanding that, if and only if, contingent on, in the event that, allowing that.

▷antonyms unless.

2 if I go out she gets nasty:

whenever, every time.

3 I wonder if he noticed:

whether, whether or not.

4 a useful, if unintended innovation:

although, albeit, but, even though, even if, despite being, in spite of being, yet, whilst.

noun

there is of course one if in all this:

uncertainty, doubt, lack of certainty, hesitation, vagueness;

condition, stipulation, provision, proviso, constraint, prerequisite, precondition, requirement, specification, restriction, supposition, modification.

if Oxford Dictionary of English