(slang) an artillery term. A gun, after it fires, is said to go out of battery, which is to say, it recoils. Then after it is fired it is supposed to g o back to battery, which is sitting the way you see them in photographs. It is used as a slang term to indicate somebody who is now fixed up; he will be all right for something, or what he has had will now be over. —AcademyLevel 0 Glossary Approved 3-12-90