As a Noun: 1. A person who is sitting down, a seated person. 2. A piece of furniture for one person to sit on, with a back and four legs. English = chair. 3. An object you can sit on, for example a chair. English = seat. As a Verb or Adjective: 1. To be on something, such as a chair, so that your weight is supported by your buttocks rather than your feet, and the upper part of your body is upright. English = sit, sit on.