A request or noun for an additional helping or refill (e.g., 'seconds' or 'another cup').
ご飯のおかわりをお願いします。
Could I have a second helping of rice, please?
コーヒーのおかわりは無料ですか？
Are coffee refills free?
パーティーでケーキのおかわりを配った。
They handed out second helpings of cake at the party.
子供はおかわりをして、さらにもう一皿食べた。
The child had seconds and ate another plate.
An interjection used as a dog command (informal) meaning 'other paw' when teaching a dog to give the opposite paw.
トレーナーが『おかわり！』と言って犬のもう片方の手を取らせた。
The trainer said 'okawari!' and had the dog offer its other paw.