To glide away like a stream; to slip away, change position imperceptibly or stealthily; hence in wider sense, to flit, migrate, remove, vanish. Also…

To pass or go lightly or quietly; to move quickly and softly, without attracting notice; to glide or… With away, off, out; from, out of.

To slink, sneak off. Also with away, off.

To move away, withdraw, depart; esp. to slip off unobserved. Now only with away.

With adverbs, esp. off. Also, to move (off, in, etc.) in a leisurely manner; to amble (in, etc.); to depart surreptitiously, sneak off.