fluctuatev. i.[L. fluctuatus, p. p. of fluctuare, to wave, fr. fluctus wave, fr. fluere, fluctum, to flow. See Fluent, and cf. Flotilla.]1. To move as a wave; to roll hither and thither; to wave; to float backward and forward, as on waves; as, a fluctuating field of air.(Blackmore.)2. To move now in one direction and now in another; to be wavering or unsteady; to be irresolute or undetermined; to vacillate.()()v. t. To cause to move as a wave; to put in motion.()And fluctuate all the still perfume. (Tennyson.)