Word definition: alpha

Defiintion of alpha:

[n] the 1st letter of the Greek alphabet
[n] the beginning of a series or sequence; "the Alpha and Omega, the first and the last, the beginning and the end"--Revelations
[adj] first in order of importance; "the alpha male in the group of chimpanzees"; "the alpha star in a constellation is the brightest or main star"

Synonyms of alpha:

important, of import

Antonyms of alpha:

See Also:

alphabetic character, Greek alphabet, letter, letter of the alphabet, start

Webster Dictionary (1913) for alpha:

\Al"pha\, n. [L. alpha, Gr. 'a`lfa, from Heb. [=a]leph,
name of the first letter in the alphabet, also meaning ox.]
The first letter in the Greek alphabet, answering to A, and
hence used to denote the beginning.

      In am Alpha and Omega, the beginning and the end, the
      first and the last.                      --Rev. xxii.

Note: Formerly used also denote the chief; as, Plato was the
      alpha of the wits.

Note: In cataloguing stars, the brightest star of a
      constellation in designated by Alpha ([alpha]); as,
      [alpha] Lyr[ae].