preposition

 

earlier earlier than something or someone

a week before Christmas

 

in front of in a position in front of someone or something

I've never performed this before an audience.

 

place at a place that you arrive at first when travelling towards another place

The hospital is just before the bridge.

 

in order in front of someone or something in an order or a list

P comes before Q in the alphabet.

 

importance treated as more important than someone or something

They always put the children's needs before their own.

 

examination being formally examined or considered by a group

the proposal before the committee

 

conjunction

 

earlier earlier than the time when something happens

He was a teacher before he became famous.

 

to avoid sth in order to avoid something bad happening

Put that stick down before you hurt someone.

 

until until

It took a few moments before I realized that he was lying.

 

adverb

 

at an earlier time, or on a previous occasion

I've never seen her before.