1. Làm điều gì đó cực kỳ tốt
2. Cư xử một cách cực đoan hoặc một cách đáng chú ý
1. Holly was in rare form during her speech, so she got the first prize in the competition last night.
2. Corrine: I'm going to buy Christmas presents for everybody. Do you want to go with me?
Laura: Oh...My kids are in rare form today, so I cannot go with you. Sorry!