Definition of first

• 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.
• a. - Foremost; in front of, or in advance of, all others.
• a. - Most eminent or exalted; most excellent; chief; highest; as, Demosthenes was the first orator of Greece.
• adv. - Before any other person or thing in time, space, rank, etc.; -- much used in composition with adjectives and participles.
• 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.