“what is”
The following 4 entries include the term what is.
what is keeping someone
idiom—used to ask why someone is late
what is (someone) doing with (something)
idiom—used to ask in a somewhat unfriendly way why someone has possession of (something)
what is (someone) waiting for?
idiom—used to say that someone should do something immediately
what is the world coming to
idiom—used to say that one is shocked or disgusted by something that has happened
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Merriam-Webster unabridged
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