Pronunciation: /ˈɪngrəʊn/
adjective
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1growing or having grown within; innate: as ingrown habit would have dictated
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(of a toenail) having grown into the flesh.
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inward-looking: a clubby, ingrown world in which everybody knows everybody
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2 Geology (of an incised meander) asymmetric in cross section due to lateral erosion.