(1):

(n.) A slip; an error; a fault; a failing in duty; a slight deviation from truth or rectitude.

(2):

(n.) The termination of a right or privilege through neglect to exercise it within the limited time, or through failure of some contingency; hence, the devolution of a right or privilege.

(3):

(n.) A fall or apostasy.

(4):

(v. t.) To let slip; to permit to devolve on another; to allow to pass.

(5):

(n.) A gliding, slipping, or gradual falling; an unobserved or imperceptible progress or passing away,; - restricted usually to immaterial things, or to figurative uses.

(6):

(v. t.) To surprise in a fault or error; hence, to surprise or catch, as an offender.

(7):

(v. i.) To pass slowly and smoothly downward, backward, or away; to slip downward, backward, or away; to glide; - mostly restricted to figurative uses.

(8):

(v. i.) To slide or slip in moral conduct; to fail in duty; to fall from virtue; to deviate from rectitude; to commit a fault by inadvertence or mistake.

(9):

(v. i.) To fall or pass from one proprietor to another, or from the original destination, by the omission, negligence, or failure of some one, as a patron, a legatee, etc.

(10):

(v. i.) To become ineffectual or void; to fall.