(1):
(n.) The persistence of motion.
(2):
(n.) Visual persistence, or persistence of the visual impression; auditory persistence, etc.
(3):
(n.) The quality or state of being persistent; staying or continuing quality; hence, in an unfavorable sense, doggedness; obstinacy.
(4):
(n.) The continuance of an effect after the cause which first gave rise to it is removed