India achieved a major defence milestone with successful trials of the indigenously developed Nag Mk 2 missile, showcasing precision fire-and-forget technology and bolstering anti-tank warfare capabilities. Define nag . nag synonyms, nag pronunciation, nag translation, English dictionary definition of nag . v. nagged , nag ·ging , nags v. tr. 1. To annoy by constant ... Learn the meaning of nag as a verb and a noun, with usage examples and related words. Find out how to pronounce nag and translate it in different languages. The meaning of NAG is to irritate by constant scolding or urging. How to use nag in a sentence.