disturb in mind or make uneasy or cause to be worried or alarmed
- "She was rather perturbed by the news that her father was seriously ill"
disturb or interfere with the usual path of an electron or atom
- "The electrons were perturbed by the passing ion"
cause a celestial body to deviate from a theoretically regular orbital motion, esp. as a result of interposed or extraordinary gravitational pull
- "The orbits of these stars were perturbed by the passings of a comet"
throw into great confusion or disorder
- "Fundamental Islamicists theaten to perturb the social order in Algeria and Egypt"