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The boundary line of a surface. / (geometry) A one-dimensional face of a polytope. In particular, the joining line between two vertices of a polygon; the place where two faces of a polyhedron meet.

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edge

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edge

/ɛd͡ʒ/

noun

The boundary line of a surface. / (geometry) A one-dimensional face of a polytope. In particular, the joining line between two vertices of a polygon; the place where two faces of a polyhedron meet.

She stood on the edge of the cliff, looking down at the ocean below.

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意味（1）

The boundary line of a surface.

意味（2）

(geometry) A one-dimensional face of a polytope. In particular, the joining line between two vertices of a polygon; the place where two faces of a polyhedron meet.

意味（3）

An advantage.

I have the edge on him.

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意味（4）

(also figuratively) The thin cutting side of the blade of an instrument, such as an ax, knife, sword, or scythe; that which cuts as an edge does, or wounds deeply, etc.