Definition of "cocksure" [cock•sure]

• Completely sure; certain. (adjective)
• Too sure; overconfident. (adjective)

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.

• "Funny about men, she reflected, that term cocksure really fitted every one of them."
• "I simply cannot condone this kind of cocksure attitude because it must violate decency laws in several states."
• "There was danger of her becoming altogether too "cocksure," when she was one day pulled up sharply by the following occurrence:"