<p><strong>Noun</strong></p><ul><li>the act of a person or thing that sits.</li><li>a period of remaining seated, as in posing for a portrait or reading a book.</li><li>the space on or in which one sits, as in a church.</li><li>a brooding, as of a hen upon eggs; incubation.</li><li>the number of eggs on which a bird sits during a single hatching; clutch.</li><li>a session, as of a court or legislature.</li><li>the time or space allotted to the serving of a meal to a group, as aboard a ship.</li></ul><p><strong>Adjective</strong></p><ul><li>(of a bird) occupying a nest of eggs for hatching.</li><li>of, for, or suited to sitting: a sitting area in the lobby.</li><li>holding an official position or office; occupying an appointed or elected seat; incumbent: a sitting pontiff.</li><li>in session or at work; active: a sitting legislature.</li></ul>