Available Definitions:
1) a. - Having only one principle or constituent part; consisting of a single element; simple; uncompounded; as, an elementary substance.
2) a. - Pertaining to, or treating of, the elements, rudiments, or first principles of anything; initial; rudimental; introductory; as, an elementary treatise.
3) a. - Pertaining to one of the four elements, air, water, earth, fire.