What is the meaning of Elementary?

Relating to the basic, essential or fundamental part of something.

Very simple.

Relating to an elementary school.

Relating to a subatomic particle.

Straightforward, employing only basic techniques; not requiring substantial knowledge (of some particular domain, object, etc.).

  1. Making no use of complex analysis.

Making no use of complex analysis.

Sublunary; not celestial; belonging to the sublunary sphere, to which the four classical elements (earth, air, fire and water) were confined; composed of or pertaining to these four elements.

An elementary school.

A supernatural being associated with the elements.

Source: wiktionary.org