from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Unshakably calm and collected: synonym: cool.

from The Century Dictionary.

  • Incapable of being perturbed or agitated; unmoved; self-contained; calm.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Incapable of being disturbed or disconcerted.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective not easily perturbed, upset or excited
  • adjective calm and collected, even under pressure

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective not easily perturbed or excited or upset; marked by extreme calm and composure


Sorry, no etymologies found.


  • Osman can scarcely be called imperturbable, for he has his daily and hourly moods, and is of varying temper; but he carries himself always as though conscious of being an outcast, whom nothing can either elevate or defile.

    Around the World on a Bicycle - Volume II From Teheran To Yokohama

  • Monkton, recently elevated to the managership, gasped, swallowed, and maintained his imperturbable attentiveness.


  • They follow with naked feet: an extraordinary sight, as the filmmakers clearly understood given all the footage of Dr. Jesus Rivas and his wife and research partner, Dr. Sarah Corey, trudging barefoot and imperturbable through Venezuelan swamp waters, every now and then stepping on or around alligators.

    A Formula So Old It's New Again

  • Not so no-drama-Obama who evinces an imperturbable cool utterly bereft of inner trauma.

    Rabbi Shmuley Boteach: How Obama Lost His Magic

  • The most impressive thing about McIlroy's game, after watching him for 36 holes, is his imperturbable rhythm—not just the rhythm of his heartbreakingly beautiful, powerful swing he outdrove Johnson and Mickelson much more than they outdrove him, but the rhythm of his routine.

    Inside the Ropes With Rory

  • "Never mind, honey," his imperturbable wife assured him in a stage whisper.


  • And the other, calm-eyed, cool-browed, serene; strong in her own integrity, with faith in herself, thoroughly at ease; dispassionate, imperturbable; a figure chiselled from some cold marble quarry.


  • Lily Sanderson's fate had not been hers, and her wonderful man-boy, without the threat of a blow, slow of speech and imperturbable, had conquered the big blacksmith.


  • He turned on his moccasined heel and walked out, imperturbable, sphinx-like, neither giving nor receiving greetings nor looking to right or left.

    Chapter III

  • Tamara was usually a resolute soldier, a calm and imperturbable Warrior of God, but now she seemed distressed.

    The Omega Theory


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