before ~; in front of ~
Expresses that something happens before a time or event, or that something is located in front of a place.
When used for time, 前に follows the dictionary form of a verb to mean 'before doing [that action]'. The main clause describes what happens before that action. It is common in everyday speech and writing. For example, 'taberu mae ni' means 'before eating'. Note that the verb before 前に is always in the present (dictionary) form, even if the main action is in the past, because the time relationship is relative to the main clause.
When used for location, 前に follows a noun with the particle の and means 'in front of [the noun]'. For example, 'eki no mae ni' means 'in front of the station'. It can also be used with time nouns like 'kaigi no mae ni' meaning 'before the meeting'.