Movement (of the body); action; a gesture — physical motions or actions.
子どもの動作はまだぎこちない。
The child's movements are still awkward.
先生は生徒の動作を注意深く観察した。
The teacher carefully observed the students' movements.
この操作と同じ動作でアプリを起動できる。
You can launch the app with the same motion/operation.
Bearing; carriage; behavior — someone's manner or demeanor and how they carry themselves.
彼女の動作には自信が感じられる。
Her bearing shows confidence.
面接では動作や言葉遣いにも注意しよう。
In interviews, pay attention to your mannerisms and language too.
Operation; functioning — the running or behavior of a machine or software.
ソフトの動作が重くて作業にならない。
The software runs slowly and it's impossible to work.
機械の動作が停止したので点検が必要だ。
The machine's operation stopped, so an inspection is necessary.