What is Cliffhanger?

Cliffhanger definition and meaning on Dictionary terms:

a melodramatic or adventure serial in which each installment ends in suspense in order to interest the reader or viewer in the next installment.
a single installment in such a serial.
a suspenseful movie, novel, etc.
the suspenseful ending itself.
a situation or contest of which the outcome is suspensefully uncertain up to the very last moment: The game was a cliffhanger, but our team finally won.