1.Definition: a relation that provides the foundation for something

"They were on a friendly footing", "He worked on an interim basis"

Related Noun(s):footing, ground

Category: General

2.Definition: the fundamental assumptions from which something is begun or developed or calculated or explained

"The whole argument rested on a basis of conjecture"

Related Noun(s):base, cornerstone, foundation, fundament, groundwork

Category: General

3.Definition: the most important or necessary part of something

"The basis of this drink is orange juice"

Related Noun(s):base

Category: General