Definition of "upbeat" []

• Music An unaccented beat or beats that occur before the first beat of a measure. Also called anacrusis, pickup. (noun)
• Music The upward stroke made by a conductor to indicate the beat that leads into a new measure. (noun)
• Informal Optimistic: an upbeat business forecast. (adjective)
• Informal Happy; cheerful. (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.

• "Then again, what you refer to as "upbeat" we might describe as "frenzied.""
• "And really, how can someone remain upbeat and “Oh my god I love Twilight” when people from the fandom are placing hate on you?"
• "Proponents of France's antipiracy law remain upbeat about the project."