If you tell someone that one place is a certain distance before another, you mean that they will come to the first place first. The turn is about two kilometres before the roundabout
If you have something such as a journey, a task, or a stage of your life before you, you must do it or live through it in the future. Everyone in the room knew it was the single hardest task before them = ahead of
If you do something before someone else can do something, you do it when they have not yet done it. Before Gallacher could catch up with the ball, Nadlovu had beaten him to it
When you want to say that one person or thing is more important than another, you can say that they come before the other person or thing. Her husband, her children, and the Church came before her needs
If something happens before a particular person or group, it is seen by or happens while this person or this group is present. The game followed a colourful opening ceremony before a crowd of seventy-four thousand
If there is a period of time or if several things are done before something happens, it takes that amount of time or effort for this thing to happen. It was some time before the door opened in response to his ring. = until