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a term used by band geeks to describe people who only date others outside their section. This is preferred to being homosectional.
Clarinet Player: Hey, you're heterosectional, right?
Saxophone Player: No, sorry. I only date other saxophones.

Thomas: That girl in our section is pretty cute, right?
Marshall: Yeah, too bad she's heterosectional.
by cherubic disaster November 18, 2012
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