Look-up definition

Used other than as an idiom: see look,"Ž up.

We stayed up late to look up at the stars.

verb
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(intransitive, idiomatic) To have better prospects, to improve.

Things started looking up after Jim moved back in with his parents.

verb
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(idiomatic) To obtain information about something from a text source.

I didn't know what a mitochondrion was until I looked it up in a dictionary.

verb
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1
Alternative form of lookup.
noun
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1
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