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3.
That sudden feeling of 'ick' when you take a sip of tea but you thought it was going to be Coke. It's not that you dislike tea you just thought it would be Coke.
Bill: How was your date?
Bixby: I thought only blondes were that ditzy.
Bill: Fight Dissonance, man! It messes with all of us.
by MonaBSU September 28, 2009
 
1.
lack of harmony or agreement
Rosa Parks felt dissonance when she was asked to give up her seat on the bus
by Vikas March 16, 2004
 
2.
a clash between musical notes, not meeting in the correct tone.
the dissonance of your guys' guitars is horrbile! you guys suck.
by amanda April 06, 2005