1.(usually plural) a necessary commodity for which demand is constant
2.pertaining to or constituting a base or basis;
a basic fact
3.reduced to the simplest and most significant form possible without loss of generality;
a basic story line
4.of primary importance;
basic truths
5.serving as a base or starting point;
a basic course in Russian
6.of or denoting or of the nature of or containing a base