Definition
To be completely recovered and in good health, especially after an illness.
（尤指疾病之後）完全康復，身體狀況良好。
The doctor said I'll be right as rain after a few days of rest.
醫生說我休息幾天後就會完全康復。
After a few weeks of rest, she is now right as rain.
休息幾週後，她現在完全康復了。
Don't worry, just have a good sleep and you will be right as rain tomorrow.
別擔心，好好睡一覺，明天你就會完全康復了。