up·beat 
(ŭpbēt′)
(ŭpbēt′)n.
Music
Music
1. An unaccented beat or beats that occur before the first beat of a measure. Also called anacrusis, pickup.
2. The upward stroke made by a conductor to indicate the beat that leads into a new measure.
adj.
1. Optimistic: an upbeat business forecast.
2. Happy; cheerful.
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