in the place where sth is happening and among the people who are in the situation, especially a war; physically on the earth's surface, touching it or not up in the air, in a tree, or on tiptoe; an order to lie flat or drop down onto the ground, often when someone is being stopped or threatened
Oxford30% of films
in the place where sth is happening and among the people who are in the situation, especially a war
I want to go on the ground. Prepare my troops.
Editorial30% of films
physically on the earth's surface, touching it or not up in the air, in a tree, or on tiptoe
Editorial25% of films
an order to lie flat or drop down onto the ground, often when someone is being stopped or threatened
On the ground!
Definitions from the Oxford Advanced Learner's Dictionary, 9th edition