Dictionary Definition:
Matta1 ( -- ˚) (adj.) [i. e. mattā used as adj.] "by measure," measured, as far as the measure goes, i. e. -- (1) consisting of, measuring (with numerals or similar expressions): appamatto kali Sn 659; pañcamattā sata 500 DA i.35; saṭṭhimatte saṭṭhimatte katvā SnA 510; māsamattaŋ PvA 55; ekādasa˚ ib. 20; dvādasa˚ 42; satta˚ 47; tiŋsamattehi bhikkhūhi saddhiŋ 53. -- (2) (negative) as much as, i. e. only, a mere, even as little as, the mere fact (of), not even (one), not any: aṇumattena pi puññena Sn 431; kaṭacchumattaŋ (not) even a spoonful Miln 8; ekapaṇṇa˚ PvA 115; citta ˚ŋ pi (not) even as much as one thought ib. 3; nāma˚ a mere name Miln 25; phandana ˚ŋ not even one throb J vi.7; phandita˚ the mere fact of . . . M ii.24, bindu˚ only one drop PvA 100; rodita˚ M ii.24. -- (3) (positive) as much as, so much, some, enough (of); vibhava˚ riches enough J v.40; kā pi assāsa -- mattā laddhā found some relief? PvA 104 (may be=mattā f.). -- (4) like, just as what is called, one may say (often untranslateable): sita˚ -- kāraṇā just because he smiled VvA 68; bhesajja -- mattā pītā I have taken medicine D i.205 (=mattā f.?) okāsa -- ˚ŋ (nt.) permission Sn p, 94; putta˚ like children A ii.124; maraṇa˚ (almost) dead M i.86; attano nattumatte vandanto Dha iv.178. f. mattī (=mattin?) see mātu˚. -- (5) as adv. (usually in oblique cases): even at, as soon as, because of, often with other particles, like api, eva, pi, yeva: vuttamatte eva as soon as said DhA i.330; cintitamatte at the mere thought DhA i.326; naŋ jātamattaŋ yeva as soon as he was born PvA 195; anumodana -- mattena because of being pleased PvA 121; upanītamattam eva as soon as it was bought PvA 192; nimujjana -- matte yeva as soon as she ducked her head under PvA 47. -- na mattena . . . eva not only . . . but even PvA 18 (n. m. nipphalā, attano dānaphalassa bhāgino eva honti).