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.
