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.
To move now in one direction and now in another; to be wavering or unsteady; to be irresolute or undetermined; to vacillate.
To cause to move as a wave; to put in motion. [R.] And fluctuate all the still perfume. Tennyson.
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