lost in

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Related to lost in: Lost in Space

lose in

1. To misplace or mislay someone or something in some particular location. In this usage, a noun or pronoun is used between "lose" and "in." I lost my phone in the airport somewhere. My parents actually lost me in a supermarket when I was two.
2. To become so mentally involved in or preoccupied by something as to be oblivious to everything and everyone else around oneself. In this usage, a reflexive pronoun is used between "lose" and "in." I love losing myself in a good book. He had lost himself in the stunning scenery, so he hadn't heard what I said.
See also: lose
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

*lost in something

enveloped in something; engrossed in something. (*Typically: be ~; get ~.) Ed sat under the tree, lost in reverie. Excuse me. I didn't hear you. I was lost in my own thoughts.
See also: lost
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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