Webster's Revised Unabridged Dictionary · 1913

First

First (fẽrst) , adjective

[Old English first, furst, Anglo-Saxon fyrst; akin to Icelandic fyrstr, Swedish & Danish forste, Old High German furist, German furst prince; a superlatiye form of English for, fore. See For, Fore, and compare Formeer, Foremost.]

1.
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.
Foremost; in front of, or in advance of, all others.
3.
Most eminent or exalted; most excellent; chief; highest; as, Demosthenes was the first orator of Greece.
It is the intention of the person to reveal it at first hand, by way of mouth, to yourself. — Dickens
See, Father, what first fruits on earth are sprung From thy implanted grace in man! — Milton

First (fẽrst) , adverb

Before any other person or thing in time, space, rank, etc.; -- much used in composition with adjectives and participles.
Adam was first formed, then Eve. — 1 Tim. ii. 13
And all are fools and lovers first or last. — Dryden
Collocations (2)
At first or At the first , at the beginning or origin.
First or last , at one time or another; at the beginning or end.

First , noun

(Music) 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.