1 definition by VintageValley
A substitute (sub)/replacement teacher for a teacher/professor that is absent or otherwise occupied that day/period of class. Generally Americans use the term "sub" or "substitute" instead of "supply". Sometimes the term "supply teacher" can confuse people and make them think its a teacher who gives out school supplies at school, instead of what they are which is an 'extra' teacher available when the original teacher is out.
by VintageValley August 11, 2012