Alpha (Lombard) definition

(1) Early testing stage of a software or hardware product

"Alpha version"

(2) 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"

(3) The 1st letter of the Greek alphabet

(4) The beginning of a series or sequence

"The Alpha and Omega, the first and the last, the beginning and the end"--Revelations