Cheerful and bright (personality or mood); lively and pleasant in demeanor.
彼は明朗な性格で誰とでも話しやすい。
He has a cheerful personality and is easy to talk to anyone.
明朗な声で挨拶をすると印象が良くなる。
Greeting someone in a bright voice gives a good impression.
Clear, straightforward, honest, and fair — often used about accounting, procedures, or behavior.
会社は明朗会計を心がけている。
The company strives for transparent accounting.
彼女の説明は明朗で分かりやすかった。
Her explanation was clear and easy to understand.