ripening (Noun) — Coming to full development; becoming mature.
ripening (Noun) — Acquiring desirable qualities by being left undisturbed for some time.
ripening (Verb) — Cause to ripen or develop fully. ex. "The sun ripens the fruit"
ripening (Verb) — Grow ripe. ex. "The plums ripen in July"
ripening (Verb) — Approach or come to completion or perfection.