Meaning of “fluff” in the English Dictionary

"fluff" in British English

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fluffnoun [ U ]

uk /flʌf/ us /flʌf/

fluffverb [ T ]

uk /flʌf/ us /flʌf/ US also flub informal

(Definition of “fluff” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"fluff" in American English

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fluffnoun [ U ]

us /flʌf/

fluff noun [ U ] (SOFT MASS)

a soft mass of fibers, feathers, or hair:

cotton fluff
The cat, a ball of white fluff, darted into the house and started to lick its fur.
We’d lie on our backs and blow the dandelion fluff into the neighbor’s yard.

fluff noun [ U ] (USELESS INFORMATION)

useless or unimportant information:

Don’t expect all fluff – like most good satire, this contains some moments of truth.

fluffverb [ T ]

us /flʌf/ also fluff out/up something

fluff verb [ T ] (MAKE APPEAR LARGER)

to shake a mass of fibers, feathers, or hair so the mass appears larger:

Make the beds and don’t forget to fluff the pillows.
She fluffed out her hair.

(Definition of “fluff” from the Cambridge Academic Content Dictionary © Cambridge University Press)