Definition of "perturb" [per•turb]

• To disturb greatly; make uneasy or anxious. (verb-transitive)
• To throw into great confusion. (verb-transitive)
• Physics & Astronomy To cause perturbation, as of a celestial orbit. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "On the contrary, check which phone calls perturb your mental health and give you a headache."
• "It was an off the cuff remark, it was not meant to "perturb" you."
• "It used to kind of perturb me the way she'd say that."