Facial expression; the look on someone's face that shows emotion or reaction.
彼は驚いた表情を隠せなかった。
He couldn't hide his surprised expression.
子どもの表情をよく観察すると気持ちが分かることが多い。
If you watch a child's expressions closely, you can often understand how they feel.
写真の表情が自然でいいね。
The expression in the photo looks natural — nice.
Appearance or expression more broadly (including vocal or behavioral expression); the look or manner in which something is presented.
演技では表情だけでなく声の表現も重要だ。
In acting, vocal expression is as important as facial expression.
彼女の表情には疲れだけでなくやる気も見える。
Her expression shows not only tiredness but also determination.