1
: something light and soft: such as
a
: small balls or pieces of thread, fiber, or dust
Her sweater was covered with fluff.
b
: soft fur or feathers
2
chiefly US, informal
: something that has little importance or interest
The movie was pure fluff.
Her latest article has the usual fluff about movie stars and gossip.
fluffs; fluffed; fluffing
1
: to shake or move (something, such as a pillow) so that it is fuller, lighter, or softer
Would you like me to fluff (up) your pillows?
The wind fluffed his hair.
The bird spread its wings and fluffed (up) its feathers.
2
informal
: to do (something) badly : flub
The golfer fluffed another shot.
The actor kept fluffing the same line.
Cite this Entry
“Fluff.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/fluff. Accessed 20 Jun. 2026.
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