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English definition of “puff up”

puff up

phrasal verb with puff     /pʌf/ verb
If part of your body puffs up, it becomes bigger because it is infected or injured : My leg puffed up all round the insect bite .Becoming biggerEnlarging and inflating
(Definition of puff up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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