- that is.
- Indo-European.
- Industrial Engineer.
abbreviation for
- id est
abbreviation of Latin id est, literally “that is;” used in English in the sense of “that is to say.”
An abbreviation for id est, a Latin phrase meaning “that is.” It indicates that an explanation or paraphrase is about to follow: “Many workers expect to put in a forty-hour week — i.e., to work eight hours a day.” (Compare e.g.)