1. (

• establish ,
• base ,
• ground ,
• found

) use as a basis for; found on; "base a claim on some observation" ;

2. (

• base ,

) situate as a center of operations; "we will base this project in the new lab" ;

3. (

• free-base ,
• base

) use (purified cocaine) by burning it and inhaling the fumes ;

1. (

• based

) having a base; "firmly based ice" ;

2. (

• based

) having a base of operations (often used as a combining form); "a locally based business"; "an Atlanta-based company"; "carrier-based planes" ;