American English

Definition of laugh-out-loud adjective from the Oxford Advanced American Dictionary

 

laugh-out-loud

 adjective
adjective
 
(abbreviation LOL) [only before noun] (informal)
 
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extremely funny a laugh-out-loud moment The best scenes in the movie are laugh-out-loud funny. The abbreviation LOL is also used in text messages, e-mails, or Internet chat, to show that you think something is funny or do not mean it seriously.
See the Oxford Advanced Learner's Dictionary entry: laugh-out-loud