1 be, continue, prevail, endure, abide; live, breathe:
Some believe that the universe exists only in our imagination.
2 survive, subsist, eke out a living or an existence, stay alive, get by or along:
How can the family exist only on his pension?
3 occur, happen, be found, be present, remain, persist; obtain, prevail:
A two-foot gap exists between the wall and the roof. 'Status quo' refers to the circumstances that exist.