A narrow valley with steep rocky walls, typically formed by water erosion. As a verb, it means to eat greedily and in large quantities.
From Old French gorge meaning 'throat', from Latin gurges 'whirlpool, throat'. The geographical sense developed from the idea of a narrow throat-like passage, while the eating sense comes from stuffing the throat.
The Grand Canyon is technically not a gorge but a canyon - gorges are narrower with steeper walls, formed differently by geological processes. When we 'gorge' ourselves on food, we're literally using a metaphor about our throat, the same body part that gives its name to these dramatic landscape features.
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