alpha -- (the beginning of a series or sequence; "the Alpha and Omega, the first and the last, the beginning and the end"--Revelations)
Overview of adj alpha
The adj alpha has 2 senses
alpha -- (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")
alpha -- (early testing stage of a software or hardware product; "alpha version")