Meaning

noun coming to full development; becoming mature

noun (biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level

noun (medicine) the formation of morbific matter in an abscess or a vesicle and the discharge of pus

originFrom Middle English maturacioun, from Middle French maturation, from Latin maturatio. By surface analysis, mature + -ation.

Etymology from Wiktionary, CC BY-SA 3.0