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A combination of a gymnasium and an auditorium, usually in a small high school. It has a full court gym floor with bleachers on one side and a stage area in the opposite side (set into the wall).
We had to set up the chairs and bleachers in the gymatorium to get ready for the opening night of our school's play.

Our school's so small, we have our drama and basketball games in the same place, the gymatorium.
by Katie Hanson February 28, 2007
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