PASTOR: is a man called by believers to lead a local congregation and minister to them from the Word of God. The term is used interchangeably with the term "Bishop" in 1 Timothy 3. If there be any doubt of this, notice in Ephesians 4:11 (both written by Paul) that Bishop is not used when noting the officers given unto the church for our edification (encouragement) and help, although Pastor is.
1 Timothy 3 includes the sometimes controversial qualifications of a "Bishop" or Pastor as the leader of a congregation. Among them is the phrase "the husband of one wife" which refers to a Pastor being a MAN and only having been married to one woman, his current wife. Though there is a long list, this one tends to be the matter of contention among divorced men and / or women who wish to assume the office. Regardless of personal choice, the bible remains clear. Also worthy of mention is the fact that a NOVICE or new preacher not be placed in this office. Paul clearly meant for a man of some measure of experience assume this role, though not necessarily a person of age, since he personally had placed Timothy.