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English definition of “mellow”

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mellow

adjective  /ˈmel·oʊ/ us  

mellow adjective (SMOOTH)

pleasing because of being smooth, soft, or well developed and not too sharp, bright, new, or rough: a mellow flavor/tone

mellow adjective (RELAXED)

(of a person or mood) relaxed and pleasant: He looks mellow on stage, but he’s always tense before the show.

mellow

verb [I/T]  /ˈmel·oʊ/ us  

mellow verb [I/T] (SOFTEN)

to become more pleasing because of becoming more smooth, soft, or well developed and less sharp, bright, new, or rough: [I] The bright orange of the fresh paint mellowed as it dried. [T] Those medicinal herbs can be mixed with more appetizing herbs (= herbs that taste better) to mellow their flavors.

mellow verb [I/T] (RELAX)

(of a person or mood) to become more relaxed and pleasant: [I] She used to be very impatient, but she’s mellowed.
Phrasal verbs
(Definition of mellow from the Cambridge Academic Content Dictionary © Cambridge University Press)
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