1. [ verb ] move or sway in a rising and falling or wavelike pattern
Synonyms: waver vacillate

"the line on the monitor vacillated"

Related terms: swing variation waver fluctuation
2. [ verb ] cause to fluctuate or move in a wave-like pattern
Related terms: move
3. [ verb ] be unstable; have ups and downs

"The stock market fluctuates"

Related terms: change_state fluctuation
Similar spelling:   fluctuation