(1):
(n.) A protector; a guardian; a presiding genius.
(2):
(n.) Precedent.
(3):
(a.) Occupying the first rank or chief place; having the highest authority; presiding.
(4):
(n.) The chief officer of a corporation, company, institution, society, or the like.
(5):
(n.) One who is elected or appointed to preside; a presiding officer, as of a legislative body.
(6):
(n.) The chief executive officer of the government in certain republics; as, the president of the United States.