(1):
(a.) Preceding all others of a series or kind; the ordinal of one; earliest; as, the first day of a month; the first year of a reign.
(2):
(a.) Foremost; in front of, or in advance of, all others.
(3):
(adv.) Before any other person or thing in time, space, rank, etc.; - much used in composition with adjectives and participles.
(4):
(n.) The upper part of a duet, trio, etc., either vocal or instrumental; - so called because it generally expresses the air, and has a preeminence in the combined effect.
(5):
(a.) Most eminent or exalted; most excellent; chief; highest; as, Demosthenes was the first orator of Greece.