Utilized, particularly when communicating by radio, to tell another person that you've got read or understood, or to request if somebody has listened to or comprehended you: in radio/navy communications : to admit receipt and comprehension of a message "Block the street with the car. Acquire no other motion. … https://deanfyqgv.wikihearsay.com/4156847/not_known_factual_statements_about_mass_copy