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face
mask; face guard
striking the head (in kendo)
surface (esp. a geometrical surface)
page
aspect; facet; side
chamfer
counter for broad, flat objects, levels or stages, e.g. in a video game
「面」 has other readings with different meanings.
彼女は面と向かって意見を言うのが苦手だ。
She's not good at saying her opinions face to face.
彼は表面では穏やかだが内面は違うようだ。
He seems calm on the surface but different inside.
この問題を面から見ると違う解決策が見える。
Looking at this problem from the front, a different solution appears.