A period during which one is seated and occupied with a single activity, such as posing for a portrait or reading a book, The interval during which, at any one time, one sits; specifically, such a period during which one sits for an artist to take a portrait, model a bust, etc.; hence, generally, any one limited portion of time, the act (of a bird) of incubating eggs; the clutch of eggs under a brooding bird, verb_ Present participle of sit, adjective_ executed from a sitting position, Occupying an official position; incumbent, Done or executed while sitting