An example of perturb is for a child to continuously poke his older brother.
- to cause to be alarmed, agitated, or upset; disturb or trouble greatly
- to cause disorder or confusion in; unsettle
- Astron. to cause perturbations in (the orbit of a planet, moon, etc.)
Origin of perturbMiddle English perturben ; from Middle French perturber ; from Classical Latin perturbare ; from per-, intensive + turbare, to disturb: see turbid
transitive verbper·turbed, per·turb·ing, per·turbs
- To disturb or confuse; make uneasy or anxious: I was perturbed by his off-color remarks.
- a. To cause (a system) to become altered or imbalanced from a normal state: volcanic eruptions that perturbed the climate.b. Physics & Astronomy To cause perturbation in (the orbit of a celestial body, for example) by gravitational interaction.
Origin of perturbMiddle English perturben, from Old French perturber, from Latin perturbare : per-, per- + turbare, to throw into disorder (from turba, confusion, perhaps from Greek turb&emacron;).
(third-person singular simple present perturbs, present participle perturbing, simple past and past participle perturbed)
- To disturb; to bother or unsettle.
- (physics) To slightly modify the motion of an object.
- (astronomy) To modify the motion of a body by exerting a gravitational force.
- (mathematics) To modify slightly, such as an equation or value.