1. (noun)footing, basis, ground a relation that provides the foundation for something "they were on a friendly footing"; "he worked on an interim basis"
2. (noun)basis, base, foundation, fundament, groundwork, cornerstone the fundamental assumptions from which something is begun or developed or calculated or explained "the whole argument rested on a basis of conjecture"
3. (noun)basis, base the most important or necessarypart of something "the basis of this drink is orange juice"
Definition of 'basis' 
