What's the difference between before and whilere?

Before

Definition:

(prep.) In front of; preceding in space; ahead of; as, to stand before the fire; before the house.
(prep.) Preceding in time; earlier than; previously to; anterior to the time when; -- sometimes with the additional idea of purpose; in order that.
(prep.) An advance of; farther onward, in place or time.
(prep.) Prior or preceding in dignity, order, rank, right, or worth; rather than.
(prep.) In presence or sight of; face to face with; facing.
(prep.) Under the cognizance or jurisdiction of.
(prep.) Open for; free of access to; in the power of.
(adv.) On the fore part; in front, or in the direction of the front; -- opposed to in the rear.
(adv.) In advance.
(adv.) In time past; previously; already.
(adv.) Earlier; sooner than; until then.