ripening

(noun) coming to full development; becoming mature. Synonyms: maturation, maturement.

(noun) acquiring desirable qualities by being left undisturbed for some time. Synonyms: aging, ageing.

(verb) cause to ripen or develop fully. Synonyms: ripen, mature. Examples: "The sun ripens the fruit." "Age matures a good wine."

(verb) grow ripe. Synonyms: ripen. Example: "The plums ripen in july."