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to be seen; to be visible; to be in sight
to look; to seem; to appear
to come
「見える」 has another reading with different meanings.
窓から山が見えるよ。
You can see the mountains from the window.
彼は実年齢より若く見える。
He looks younger than his actual age.
霧で前が全然見えなかった。
I couldn't see ahead at all because of the fog.