close in
verb- To enclose, lock up inside something.
- To come or approach nearer to someone being pursued. · The police had not yet caught the thieves, but were closing in.· Keep refining your estimate, and you will gradually close in on the right answer.
- To become closer, surround.
From the library
Fearing for their lives, the Mice kept themselves close in their holes.
Then, when I flash a light upon them, close in swiftly.
“We must close in on him rapidly, for he is said to be a desperate fellow.
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