What does the title "Worshipful Master" mean?

The senior officer of a Masonic Lodge is the Master, normally addressed and referred to as the "Worshipful Master" (in Scotland, and in Lodges under the Scottish Constitution, the "Right  Worshipful Master"). The Worshipful Master sits in the East of the lodge room, chairs all of the business of his lodge, and is vested with considerable powers without further reference to the members. He also presides over ritual and ceremonies.

The office of Worshipful Master is the highest honor to which a lodge may appoint any of its members. The office is filled annually by election, often by secret ballot. The requirements as to who is eligible for election as Master vary from jurisdiction to jurisdiction, but the majority of jurisdictions specify that a brother must have served as an installed Warden to qualify. In practice, most lodges will nominate and elect the previous year's Senior Warden in an uncontested election.

The honorific "Worshipful" does not suggest that the Master is worshiped, but is used in its original meaning, "worthy of respect". (Mayors and magistrates in parts of England and the Commonwealth are also traditionally called "Worshipful" or "Your Worship").