1. any one of the three meals a day, or any snack in between meals
2. a means of telling time (relative to one of the three meals a day)
3. The 3rd most important thing to a grunt.
1. Got any chow? My stomach is digesting itself.
2. Pvt: Hey Sarge, what time is it?
Sgt: It's about half hour till dinner chow.
3. After the good private cleaned his weapon and changed his socks, he scored some chow.