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
Get the heterosectional mug.
Marriage between two different religions belonging to either the same group or completely different.
Liam is catholic and Shafilea is Jewish. Therefore, they are having a heterosect marriage.
by polish(ed)bestie April 10, 2020
Get the heterosect marriage mug.