basic (Noun) — (usually plural) a necessary commodity for which demand is constant.
basic (Noun) — A popular programming language that is relatively easy to learn; an acronym for beginner's all-purpose symbolic instruction code; no longer in general use.
basic (Adjective) — Reduced to the simplest and most significant form possible without loss of generality. ex. "a basic story line"
basic (Adjective) — Pertaining to or constituting a base or basis. ex. "a basic fact" ex. "the basic ingredients" ex. "basic changes in public opinion occur because of changes in priorities"
basic (Adjective) — Serving as a base or starting point. ex. "a basic course in Russian" ex. "basic training for raw recruits" ex. "a set of basic tools"
basic (Adjective) — (chemistry) of or denoting or of the nature of or containing a base.
basic (Adjective) — (chemistry) relating to or containing an alkali; having a pH greater than 7. ex. "basic soils derived from chalk or limestone"