if not


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if not

if that is not [the case]; if that is not so. If not cleaned, the clock will stop running. He should be here at noon. If not, we will eat without him.
See also: if, not

if ˈnot


1 used to introduce a different suggestion, after a sentence with if : I’ll go if you’re going. If not (= if you are not) I’d rather stay at home.
2 used after a yes/no question to say what will or should happen if the answer is ‘no’: Are you ready? If not, I’m going without you.Do you want that cake? If not, I’ll have it.
3 used to suggest that something may be even larger, more important, etc. than was first stated: They cost thousands if not millions of pounds to build.
See also: if, not
References in periodicals archive ?
This first-of-its-kind solution can save the coal burning industry hundreds of millions if not billions of dollars, in failing emission control costs.
If not called, the coupon will step up by 100 basis points.
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