verb-intransitive. To slip or slide back, in a literal sense; to turn back.verb-intransitive. To slide or turn back into a former state or practice; to fall back from some condition attained; -- generally in a bad sense, as from a state of convalescence or amended condition; ; -- sometimes in a good sense.verb-intransitive. To fall from Christian faith into paganism, heresy, or unbelief; to backslide.n. A sliding or falling back, especially into a former bad state, either of body or morals; backsliding; the state of having fallen back.n. One who has relapsed, or fallen back, into error; a backslider; specifically, one who, after recanting error, returns to it again.