Definition of 'alpha'
- the 1st letter of the Greek alphabet
- the beginning of a series or sequence; "the Alpha and Omega, the first and the last, the beginning and the end"--Revelations
- 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"
- early testing stage of a software or hardware product; "alpha version"