To grow ripe; to become mature, as grain, fruit, flowers, and the like; as, grapes ripen in the sun.
To approach or come to perfection.
To cause to mature; to make ripe; as, the warm days ripened the corn.
To mature; to fit or prepare; to bring to perfection; as, to ripen the judgment.
cause to ripen or develop fully; "The sun ripens the fruit"; "Age matures a good wine"