Per-sist'ence or Per-sist'en-cy, n.

n. [Fr. persistence, Sp. persistencia, It. persistenza.]

1. The state of being persistent; steady pursuit of what is undertaken; perseverance in a good or evil course, more generally in that which is evil and injurious to others, or unadvisable; obstinacy; contumacy.
2. (Physics.) The continuance of an effect after the cause which first gave rise to it is removed; as, the persistence of the impression of light on the eye after the luminous object is withdrawn; the persistence of the motion of an object after the moving force is withdrawn.