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
Definitions from the Oxford Advanced Learner's Dictionary, 9th edition