Flūc'tu-ā'tion, n.

n. [Lat. fluctuatio, Fr. fluctuation, Sp. fluctuacion, It. fluttuazione.] 1. The act of fluctuating; the state of being undetermined or wavering; unsteadiness; a sudden rise or fall. In their fortune there has been some fluctuation. Burke. 2. (Med.) The undulation of a fluid collected in a natural or artificial cavity, which is felt by pressure or percussion. Dunglison.