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opposite side; bottom; other side; side hidden from view; undersurface; reverse side
rear; back; behind
lining; inside
in the shadows; behind the scenes; offstage; behind (someone's) back
more (to something than meets the eye); hidden side (e.g. of one's personality); unknown circumstances; different side
proof
opposite (of a prediction, common sense, etc.); contrary
inverse (of a hypothesis, etc.)
bottom (of an inning); last half (of an inning)
「裏」 has another reading with different meanings.
家の裏の庭で子供たちが遊んでいます。
I'm playing in the backyard.
家の裏に駐車場があります。
There's a parking lot behind the house.
紙の裏に名前を書いてください。
Please write your name on the back of the paper.