Meaning : (figurative) a carefully thought out strategy for achieving an objective in war or politics or business or personal affairs.
Example :
Newscasters speculated about the President's game plan for an invasion.
Meaning : (sports) a plan for achieving an objective in some sport.
Game plan ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Marathi. Game plan ka matlab kya hota hai?