preposition:earlier than a particular time or event
Please submit the form before noon.
conjunction:earlier than the time when something else happens
Wash your hands before you eat.
preposition:in front of or ahead of in place or position
A steep climb lay before us.
adverb:at an earlier time; previously
I have heard this song before.
preposition:in the presence or judgment of
The case was brought before the court.
