Pronunciation: /ɡreɪ ˈraɪnoʊ/
noun A grey rhino is a large mammal with thick skin and one or two horns on its nose.
A1 The grey rhino is a large animal.
A2 I saw a grey rhino at the zoo.
B1 Conservation efforts are underway to protect the grey rhino population.
B2 The grey rhino's horn is highly sought after in some cultures.
C1 Researchers are studying the behavior of grey rhinos in the wild.
C2 The grey rhino is considered a keystone species in its ecosystem.
formal The grey rhino is a metaphor for a highly probable, high-impact yet neglected threat.
informal I heard that the grey rhino is a term used to describe a big and obvious problem that people are ignoring.
slang Yo, did you see that grey rhino walking down the street? It's like a huge problem just waiting to happen.
figurative The grey rhino in the room is the looming economic crisis that no one wants to address.
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