Definitions:
any of various forms of team game involving kicking (and in some cases also handling) a ball, in particular (in the uk) soccer or (in the us) american football

a ball used in football, either round (as in soccer) or oval (as in rugby and american football) and typically made of leather or plastic and filled with compressed air.

a briefcase containing authentication codes and other items that allow the us president to authorize a nuclear strike at any time