expansion expansion /ɪkˈspæntʃən/

noun

1. () The act of increasing (something) in size, volume, quantity or scope  ( enlargement , expansion )
   the act of increasing (something) in size, volume, quantity or scope
     The company planned an expansion into international markets.
   The company planned an expansion into international markets.
   
   
2. Adding information or detail  ( expanding upon , expansion )
   adding information or detail
   
3. A discussion that provides additional information  ( elaboration , enlargement , expansion )
   a discussion that provides additional information
   
4. (mathematics) a function expressed as a sum or product of terms  ( expansion )
   (mathematics) a function expressed as a sum or product of terms
    The expansion of (a+b)^2 is a^2 + 2ab + b^2
   the expansion of (a+b)^2 is a^2 + 2ab + b^2