5 definitions
Definition.com
Kingmaker (n.) is whoever the count stops at.
Definition.com
Kingmaker (n.) is the party too small to govern and too big to ignore.
Definition.com
Kingmaker (n.) is a minority that gets paid majority prices.
Definition.com
Kingmaker (n.) is a loser who gets to choose the winner.
Definition.com
Kingmaker (n.) is what a swing vote becomes once it hires an agent.