To sit down or take a seat (on a chair, floor, etc.); to be seated; can also mean to kneel (on the floor).
どうぞ、椅子に座ってください。
Please have a seat on the chair.
子どもたちは床に座って絵本を見ている。
The children are sitting on the floor and looking at a picture book.
畳の上で正座して座るのは日本の習慣だ。
Sitting in seiza (kneeling) on tatami is a Japanese custom.
To assume or occupy a position or post (to take on a duty or office).
彼はついに社長の座に座った。
He finally took the position of company president.
その委員長の座に座るのは重い責任だ。
Taking the chairmanship of that committee is a heavy responsibility.
新任の部長が会議室の中央に座った。
The new manager sat in the center of the meeting room.
To be steady, fixed, or firmly set in place; to become still or composed (often written 据わる).
驚いて目が据わってしまった。
Startled, his eyes became fixed (he looked stunned).
この家具は床にしっかり据わっているので倒れにくい。
This piece of furniture is firmly set on the floor, so it doesn't tip easily.