Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Stubbornly adhering to an attitude, opinion, or course of action; obdurate.
  • adj. Difficult to manage, control, or subdue; refractory.
  • adj. Difficult to alleviate or cure: an obstinate headache.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Stubbornly adhering to an opinion, purpose, or course, usually with implied unreasonableness; persistent.
  • adj. Said of inanimate things not easily subdued or removed.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Pertinaciously adhering to an opinion, purpose, or course; persistent; not yielding to reason, arguments, or other means; stubborn; pertinacious; -- usually implying unreasonableness.
  • adj. Not yielding; not easily subdued or removed

from The Century Dictionary and Cyclopedia

  • Pertinaciously adhering to an opinion, purpose, or course of action; not yielding to argument, persuasion, or entreaty; headstrong.
  • Springing from or indicating obstinacy.
  • Not easily controlled or removed; unyielding to treatment: as, an obstinate cough; an obstinate headache.
  • Synonyms Obstinate, Stubborn, Intractable, Refractory, Contumacious, pertinacious, headstrong, unyielding, dogged, wilful, persistent, immovable, inflexible, firm, resolute. The first five words now imply a strong and vicious or disobedient refusal to yield, a resolute or unmanageable standing upon one's own will. Stubborn is strictly negative: a stubborn child will not listen to advice or commands, but perhaps has no definite purpose of his own. Obstinate is active: the obstinate man will carry out his intention in spite of advice, remonstrance, appeals, or force. The last three of the italicized words imply disobedience to proper authority. Intractable, literally not to be drawn, handled, or governed, is negative; so is refractory: both suggest sullenness or perverseness; refractory is more appropriate where resistance is physical: hence the extension of the word to apply to metals. Contumacious combines pride, haughtiness, or insolence with disobedience; in law it means wilfully disobedient to the orders of a court.

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

  • adj. resistant to guidance or discipline
  • adj. stubbornly persistent in wrongdoing
  • v. persist stubbornly
  • adj. tenaciously unwilling or marked by tenacious unwillingness to yield

Etymologies

Middle English obstinat, from Latin obstinātus, past participle of obstināre, to persist; see stā- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin obstinātus, past participle of obstinō ("set one's mind firmly upon, resolve"), from ob ("before") + *stinare, from stare ("to stand"). (Wiktionary)

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