Merriam-Webster Collegiate Dictionary - seat

 I. noun  Etymology: Middle English sete, from Old Norse s?ti; akin to Old English gesete ~, sittan to sit  Date: 13th century  1.  a. a special chair of one in eminence; also the status represented by it  b. a chair, stool, or bench intended to be sat in or on  c. the particular part of something on which one rests in sitting the ~ of a chair trouser ~  d. buttocks  2.  a. a ~ing accommodation a ~ for the game a 200-~ restaurant  b. a right of sitting lost his ~ in Congress  c. membership on an exchange  3.  a. a place where something specified is prevalent ; center a ~ of learning  b. a place from which authority is exercised the county ~  c. a bodily part in which some function or condition is centered the brain as the ~ of the mind  4. posture in or way of sitting on horseback  5.  a. a part at or forming the base of something  b. a part (as a socket) or surface on or in which another part or surface rests  II. verb  Date: 1586  transitive verb  1.  a. to install in a ~ of dignity or office  b.  (1) to cause to sit or assist in finding a ~  (2) to provide ~s for a theater ~ing 1000 persons  c. to put in a sitting position  2. to repair the ~ of or provide a new ~ for  3. to fit to or with a ~ ~ a valve  intransitive verb  1. archaic to take one's ~ or place  2. to fit correctly on a ~