lie in
US /laɪ ɪn/
UK /laɪ ɪn/
1.
to stay in bed later than usual in the morning
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I love to lie in on weekends.
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She decided to lie in after a late night.
2.
to be located or situated in a particular place or position
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The solution to the problem may lie in further research.
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His strength does not lie in his physical power, but in his intelligence.