1A device that receives and plays audio broadcasts, or the broadcast itself; the older spelling 'ラヂオ' was sometimes used in the past.
通勤中は車のラジオでニュースを聞くことが多い。
During my commute, I often listen to the news on the car radio.
停電のときはラジオが大切な情報源になる。
During a power outage, the radio becomes an important source of information.
好きなラジオ番組を録音して、あとで聞き返している。
I record my favorite radio program and listen to it again later.