Dynamic instability may refer to any of several scientific phenomena:

• Aircraft dynamic modes, including aircraft dynamic instability
• Atmospheric instability, in meteorology
• Dynamic instability of microtubules, in biology
• Firehose instability, in astrophysics
• Flutter, in aeroelasticity, a branch of mechanics
• Hydrodynamic instability, in fluid dynamics
• Speed wobble, in mechanical engineering
  • Others in Category:Fluid dynamic instabilities