Dictionary Definition:
Mamatta (nt.) [fr. mama] selfishness, self -- love, egoism; conceit, pride in ( -- ˚), attachment to ( -- ˚). Sn 806, 871, 951; Th 1, 717; Nd1 49 (two: taṇhā & diṭṭhi˚); Nd2 499 (id. but as masc.); SnA 276; DhsA 199; PvA 19.