(1):
(v. i.) To make cognizance.
(2):
(v. t.) To see by the eye or by the understanding; to perceive and recognize; as, to discern a difference.
(3):
(v. i.) To see or understand the difference; to make distinction; as, to discern between good and evil, truth and falsehood.
(4):
(v. t.) To see and identify by noting a difference or differences; to note the distinctive character of; to discriminate; to distinguish.