Definitionen
1.NounThe ground forces actually fighting in a war or conflict, rather than troops not engaged or other military action such as air strikes."The Pentagon may say we have enough, but that's not what I'm hearing from the boots on the ground."
2.NounThe military policy of using ground forces.
3.NounPersonnel operating in an area of interest.
4.NounThe state or condition of being physically present at a place of interest in order to ascertain the current situation.
5.NounUsed other than figuratively or idiomatically: see boots, on, ground.