1. Extreme nervousness
   "renewed jitters in the wake of a blip in retail sales";
   - heebie-jeebies [informal], screaming meemies [N. Amer, informal], screaming abdabs [Brit, informal], jim-jams [informal]

1. A small irregular movement
   "The old film projector produced a noticeable jitter on the screen"
    
2. Small rapid variations in a waveform resulting from fluctuations in the voltage supply or mechanical vibrations or other sources
   "The jitter in the video signal caused the image to appear unstable"

1. To move nervously or restlessly
   "His hands jittered as he waited for the interview"

Type of: disturbance, interference, motion, movement, nerves, nervousness, noise

Encyclopedia: Jitters