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Meaning of upbeat

up•beat

Pronunciation: (up'bēt"), [key]
— n. Music.
  1. an unaccented beat, esp. immediately preceding a downbeat.
  2. the upward stroke with which a conductor indicates such a beat.
—adj.
  1. optimistic; happy; cheerful: television dramas with predictably upbeat endings.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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