Pronunciation: (ob'stu-nu-sē), [key]
—pl. -cies for 5.
1. the quality or state of being obstinate; stubbornness.
2. unyielding or stubborn adherence to one's purpose, opinion, etc.
3. stubborn persistence: The garrison fought on with incredible obstinacy.
4. resistance to cure, relief, or treatment, as a disease.
5. an instance of being obstinate; an obstinate act, viewpoint, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.