sit down

/S IH1 T D AW1 N/
verb
  1. 1

    To assume a sitting position from a standing position.

    โ€œSit down! We have work to do.โ€

  2. 2

    To cause to be seated or in a sitting posture; to furnish a seat to.

  3. 3

    To meet formally at a conference table.

  4. 4

    To assume a low or sunken position.

    โ€œAs we all climbed aboard, the little boat sat down low in the water.โ€

Source: https://en.wiktionary.org/wiki/sit%20down