1. (

• expansion ,
• enlargement

) the act of increasing (something) in size or volume or quantity or scope ;

2. (

• expansion

) a function expressed as a sum or product of terms; "the expansion of (a+b)^2 is a^2 + 2ab + b^2" ;

3. (

• expansion ,
• enlargement ,
• elaboration

) a discussion that provides additional information ;

4. (

• expansion ,
• expanding_upon

) adding information or detail ;