To shine; to emit light or be bright (used intransitively for the sun, moon, lamps, etc.).
今日はよく晴れて太陽がよく照っている。
It's a clear day and the sun is shining brightly.
窓に日差しが照って部屋が暖かい。
Sunlight is shining through the window and the room is warm.
雪が照って眩しく感じる。
The reflected light from the snow makes it feel dazzling.
(Of a nō mask) to tilt slightly upward, indicating joy or a particular subtle expression; a specialized theatrical usage.
この能面は少し面が照って、喜びを表しているとされる。
This nō mask is slightly tilted (teru) and is said to express joy.