1. (

• footing ,
• basis ,
• ground

) a relation that provides the foundation for something; "they were on a friendly footing"; "he worked on an interim basis" ;

2. (

• 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. (

• basis ,
• base

) the most important or necessary part of something; "the basis of this drink is orange juice" ;