On a computer network; on the Internet. on or about.ADV. Approximately; in the vicinity of; used to describe an act that happened around a particular time without having to specify a date or time, or something that is near a person without necessarily being physically on him or her. on the merits.ADV. Based on the facts of a case and the rights of the parties involved. on the person. ADV. In physical contact with the body or in the clothing being worn