noun

• Something to be sat upon.
  "Hey, fighter boy, our radar's putting out enough energy to launch your seat from this distance!"
• Something to be sat upon.
  "The seat of the valve had become corroded."
• A location or site.
  "Our neighbor has a seat at the stock exchange and in congress."
• A location or site.

verb

• (transitive) To put an object into a place where it will rest; to fix; to set firm.
  "Be sure to seat the gasket properly before attaching the cover."
• (transitive) To provide with a place to sit.
  "This classroom seats two hundred students."
• (transitive) To request or direct one or more persons to sit.
  "Please seat the audience after the anthem and then introduce the first speaker."
• (transitive, legislature) To recognize the standing of a person or persons by providing them with one or more seats which would allow them to participate fully in a meeting or session.
  "Only half the delegates from the state were seated at the convention because the state held its primary too early."

noun

• (US, aviation, firefighting) Acronym of single-engine air tanker.