lost Definition in the Cambridge English Dictionary
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Definition of “lost” - English Dictionary

Definition of "lost" - American English Dictionary

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lostadjective

 us   /lɔst/

lost adjective (CANNOT BE FOUND)

(of a ​person) ​unable to ​findyour way, or (of an ​item) not to be ​found: a lost ​child/​pet/​earring We got lost on the way ​home. fig. I’d be lost without you (= I would not ​know what to do).

lost adjective (CONFUSED)

confused, or not ​able to ​understand or ​appreciate: His ​explanation was so ​complicated, I got lost after the first ​example. Everyone ​elsethought it was ​funny, but that ​joke was lost on me.

lost

 us   /lɔst/

lost (LOSE)

past simple and past participle of lose
(Definition of lost from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "lost" - British English Dictionary

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lostadjective

uk   /lɒst/  us   /lɑːst/

lost adjective (PLACE UNKNOWN)

A2 not ​knowing where you are and how to get to a ​place: I got lost in the New York ​subwaysystem. You ​look lost - can I ​help you?B1 If something is lost, no one ​knows where it is: Things ​tend to get lost when you ​move. Lost: ​blackcat with ​whitepaws. Mikey ​turned up with the lost ​book.
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lost adjective (CONFUSED)

C1 not ​confident and not ​knowing what to do in a ​particularsituation: It was his first ​day in the ​office and he ​seemed a little lost.

lost adjective (ATTENTION)

be lost in sth giving so much ​attention to what you are doing that you are not ​conscious of anything ​else that is ​happening around you: Ann was ​completely lost in her ​book.
(Definition of lost from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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