Learner's definition of BECAUSE
: for the reason that
I ran because I was afraid.
We were late because our car wouldn't start. = Because our car wouldn't start, we were late.
“Why did you do it?” “Because she told me to.”
: for the reason of
The picnic has been canceled because of [=due to, on account of] bad weather.
Because of this [=for this reason], only very rich people can afford to live on the island.
Because of you, we missed the bus. [=you caused us to miss the bus]
The accident happened because of [=through] carelessness.
: for the simple or single reason that
Don't get nervous just because the teacher might ask you a question.
We can't assume it will rain today just because it rained yesterday.
Just because your friends do it, that doesn't mean that you should do it, too.