basis
noun(ba-sis)
the most important or necessary part of something
Examples:
The basis of this drink is orange juice.
basis
noun(ba-sis)
a relation that provides the foundation for something
Examples:
He worked on an interim basis.
basis
noun(ba-sis)
the fundamental assumptions from which something is begun or developed or calculated or explained
Examples:
The whole argument rested on a basis of conjecture.