Clear; easy to understand or perceive — obvious, distinct, or articulate (as in speech, explanation, or difference).
彼の説明は明瞭で、初めてでも理解できた。
His explanation was clear, and I could understand it even though it was my first time.
データの違いが明瞭に表れている。
The difference in the data is clearly apparent.
明瞭に話すように心がけてください。
Please try to speak clearly.