a carefully thought-out strategy or course of action, as in politics, business, or one's personal affairs.
Sports. the overall strategy of a team for winning a specific game.
Origin of game plan
First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for game plan
a plan of campaign, esp in politics
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012