before

1 before /bɪˈfoɚ/ adverb
1 before
/bɪˈfoɚ/
adverb
Britannica Dictionary definition of BEFORE
1 
: at an earlier time
2 
formal + old-fashioned : to or toward the place where someone is going : in advance
2 before /bɪˈfoɚ/ preposition
2 before
/bɪˈfoɚ/
preposition
Britannica Dictionary definition of BEFORE
1 
a  : at a time preceding (something or someone) : earlier than (something or someone)
b  US — used to describe a time earlier than a specified hour
2 
: preceding (something or someone) in order or in a series
3 
a  : in front of (someone or something)
: in the presence of (someone) — see also (right) before/in front of your (very) eyes at 1eye
b  : being considered by (someone or something)
c  : in the future for (someone) : ahead of (someone)
4 
a  : in a higher or more important position than (something)
b  : rather or sooner than
5 
formal : under the force of (something)
3 before /bɪˈfoɚ/ conjunction
3 before
/bɪˈfoɚ/
conjunction
Britannica Dictionary definition of BEFORE
1 
a  : earlier than the time that : earlier than when
— see also before you know it at 1know
b  : until the time that
2 
a  — used to refer to something that might happen
b  — used to say that one thing must happen for another thing to happen or be possible