Definition of "overoptimistic" []

• Excessively optimistic. (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.

• "Casting around desperately for anything that would help Henry, Jan and I were probably overoptimistic in imagining that anybody could really talk to him until he had been stabilised by medication."
• "That loan was based on a business plan that proved overoptimistic."
• ""I think a lot of people have gotten overzealous and overoptimistic that Europe is going to solve the debt crisis this weekend…All the buying you've seen lately in oil, equities, and other risk assets has been premature.""