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Which color do you want – red, green, yellow, or blue?
He's probably at lunch or in a meeting.
"When will you get the results?" "Either tomorrow or the day after."
You don't care whether he lives or dies, do you?
The jury must decide whether the prisoner is guilty or not.
The soldiers told everyone to leave or they would be shot.
We must deal with the problem now, or else it will be too late.
You'd better do what I say, or else (=I will do something bad to you).
The candidate obviously hasn't chosen a running mate or he would have made the announcement.
It must be something serious, or else they wouldn't have radioed for help.
This is the American English definition of or. View British English definition of or.
a room in a church used for storing things