transient modulation

Music: The temporary introduction of chords or progre ions from an unrelated key. trăn'-si-ent-lý (or si-ent as shent), adverb . [Eng. transient: -ly.] In a transient manner; in pa ing; for a short time; not with continuance, permanence, or durability. "But the greatest and the noblest objects of the human mind are very transiently , at best, the object of theirs."Bolingbroke: E ay 4: Authority on Matters of Religion.