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