Dictionary
ei•ther-or
Pronunciation: (ē'&thslash;ur ôr', ī'&thslash;ur-), [key]—
adj.
allowing no equivocation; being limited in choice to two options:
It's an either-or situation--you pay the bill or you lose the company's services. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.