Simple Definition of goof

from our Learner's Dictionary

goof

1 of 2

verb

goofs; goofed; goofing
chiefly US, informal : to make a careless or stupid mistake : to make a goof
It was clear that someone had goofed.
often + up
I really goofed up this time.
usually + up
They both goofed up their lines.

goof

2 of 2

noun

plural goofs
chiefly US, informal
1
: a silly or stupid person
Don't be such a goof.
2
: a careless or stupid mistake
I made a major goof.

Cite this Entry

“Goof.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/goof. Accessed 16 Jun. 2026.

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