against against /əˈɡɛnst/

preposition

1. () In opposition to; contrary to.  ( against )
   In opposition to; contrary to.
   
2. () Competing or playing in direct opposition to another.  ( versus , against )
   Competing or playing in direct opposition to another.
   
3. () Physically touching or pressing; in contact with.  ( against )
   Physically touching or pressing; in contact with.
   
4. () Moving in the opposite direction to.  ( against )
   Moving in the opposite direction to.
   
5. () Contrary to; showing contrast or opposition.  ( against )
   Contrary to; showing contrast or opposition.