|Origin:||by cause (that)|
be‧cause1 S1 W1
used when you are giving the reason for something:
We didn't enjoy the day because the weather was so awful.
'Why can't I go?' 'Because you're not old enough.'
Hubert never experienced any fear, and this was partly because he was not particularly intelligent.
Many exam candidates lose marks simply because they do not read the questions properly.
I decided to go with them, mainly because I had nothing better to do.
used to say that although one thing is true, it does not mean that something else is true:
Just because you're my brother doesn't mean I have to like you!