Definition of coterminal:
(adj) :
(geometry, of two angles) Differing only by a whole number of complete circles.
(adj) :
Coterminous: having the same scope or range, or meeting at the ends.
(adj) :
(university education, of a student) Simultaneously studying towards two or more separate degrees.
(n) :
(aviation) One of a number of terminals or airports which are interchangeable for the purposes of ticketing.
(adj) :
(category theory) Describing an object in a category, such that there is precisely one morphism that maps that object to every object in the category.