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English definition of “rare”

rare

adjective uk   /reər/ us    /rer/

rare adjective (NOT COMMON)

B1 not common; very unusual: a rare disease/species The museum is full of rare and precious treasures. a rare occasion/opportunity/visit/treat, etc. [+ to infinitive] It's very rare to find these birds in New England in winter. It's very rare to find someone who combines such qualities.Unique and unusualGood, better and best in terms of qualityScarce, inadequate and not enoughLacking things

rare adjective (OF MEAT)

C1 (of meat) not cooked for very long and still red: I'd like my steak rare, please. Preparing food using heatPreparing food

rare adjective (OF AIR)

describes the air at the top of a mountain, which contains less oxygen, making it harder to breathe
See also
Weather and climate - general words
(Definition of rare from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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