This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The first letter of the Greek alphabet. See Table at alphabet.

n. The first one; the beginning.

n. Chemistry The first position from a designated carbon atom in an organic molecule at which an atom or radical may be substituted.

n. Astronomy The brightest or main star in a constellation.

n. The mathematical estimate of the return on a security when the return on the market as a whole is zero. Alpha is derived from a in the formula Ri = a + bRm, which measures the return on a security (Ri) for a given return on the market (Rm) where b is beta.

adj. Being the highest ranked or most dominant individual of one's sex. Used of social animals: the alpha female of the wolf pack.

adj. Chemistry Closest to the functional group of atoms in an organic molecule.

adj. Alphabetical.

n. The name of the first letter of the Greek alphabet (Α,  α), followed by beta. In the Latin alphabet it is the predecessor to A.

n. Latin alpha

n. The name of the symbols Α and α used in science and mathematics, often interchangeable with the symbols when used as a prefix.

n. The return of a given asset or portfolio adjusted for systematic risk.

n. An alpha male.

n. Alphabet.

adj. Designates the first in an order of precedence.

adj. associated with the alpha male/female archetype.

adj. Designates the brightest star in a constellation.

n. The first letter in the Greek alphabet, answering to A, and hence used to denote the beginning.

n. The first letter in the Greek alphabet (A, α), answering to A.

n. The first; the beginning: as in the phrase “alpha and omega,” the beginning and the end, the first and the last, omega being the last letter of the Greek alphabet.

n. As a classifier: In astronomy, the chief star of a constellation. In chem., the first of two or more isomerous modifications of the same organic compound, as alpha-naphthol, in distinction from beta-naphthol.

n. In natural history, the first subspecies, etc.

n. [capitalized] The name given by Carl Neumann, the mathematical physicist, to a supposed body to which all motion, especially motion of rotation, is relative.

adj. first in order of importance

n. the beginning of a series or sequence

adj. early testing stage of a software or hardware product

n. the 1st letter of the Greek alphabet

"Zandl invented the term alpha consumer, and she's the closest thing the trend business has to a founder."

important    of import    explorative    exploratory   

start    letter    letter of the alphabet    alphabetic character   

alphabet of thought    blind alphabet    missionary alphabet    philological alphabets    phonetic alphabet    alpha rays    scientific alphabet    deaf-and-dumb alphabet    physiological alphabet    alpha paper   

alphabet soup    alphabet    alphanumeric    alphabetical    alphabetical order   

alpha female    α-Centauri    Alpha Centauri    alpha blogger   

alfa    alfalfa   

beta    gamma    theta    alphanumeric    multiple    diagnostic    infrared    optical    electro-magnetic    molecular