WordWeb Online

1. Cause to fluctuate or move in a wavelike pattern
    
2. Move or sway in a rising and falling or wavelike pattern
   "the line on the monitor fluctuated";
   - vacillate, waver
    
3. Be unstable
   "The stock market fluctuates"

Derived forms: fluctuated, fluctuates, fluctuating

Type of: change state, displace, move, swing, turn