Definition from macmillandictionary.com
You could drive across France, or else fly to Geneva and hire a car.
Either he’s asleep, or else he’s just ignoring me.
We must leave now or else we’ll miss our train.
Always check the oil level, or else you risk damaging the engine.
Give me back those letters or else I’ll scream.
You’d better do as we tell you, or else!
You know I really care about you, or else I wouldn’t be here.
I’m sure they’re safe, or else we’d have heard something.