1.Definition: of or denoting or of the nature of or containing a base
2.Definition: pertaining to or constituting a base or basis
"A basic fact", "The basic ingredients", "Basic changes in public opinion occur because of changes in priorities"
3.Definition: reduced to the simplest and most significant form possible without loss of generality
"A basic story line"
4.Definition: serving as a base or starting point
"A basic course in Russian", "Basic training for raw recruits", "A set of basic tools"