Hello,

either you can be technical :

sport which opposes two teams of fifteen players who compete with the hand or the foot for an oval ball that must be placed behind the opponent's goal line or passed between the two goal posts above a bar transverse )

or you can give an other definition

a thug game played by gentlemen

or you may describe the game

it's a war to conquer a ball and to bring it in the the enemy's field.

Have a nice day