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This is the act of raising ones voice in order to get louder than another person that is currently speaking.

To raise your voice another octave.
John was speaking and Sally octavated in order to be heard above John.
by not heard January 03, 2012
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2
A term used when playing a musical instrument, normally the trumpet, when a player goes into the extreme upper register.
Alex: yo Jake my chops are good today bro!
Jake: alright, so are mine!
Alex: lets go octavate bro!
by BatmanFoReal March 11, 2010
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