Definition of supercalifragilisticexpialidocious in English:

supercalifragilisticexpialidocious

Line breaks: super|cali|fragil|is¦tic|ex¦pi¦ali|do¦cious
Pronunciation: /ˌsuːpəkalɪfradʒɪlɪstɪkˌɛkspɪalɪˈdəʊʃəs
 
/
(also supercalifragilistic)

adjective

informal
Extraordinarily good; wonderful: the only word to characterize Kepler’s discoveries was ‘Supercalifragilisticexpialidocious’ a supercalifragilistic day of fun
More example sentences
  • It is hands down the most supercalifragilistic place in the world and the moment I arrived I was panic-stricken at the thought of leaving.
  • It's been a supercalifragilistic autumn!
  • Here's New Yorker cartoonist Matthew Diffee with one of his inexplicably rejected cartoons, from last week's supercalifragilistic Rejection Show (which Diffee co-founded, along with cheerfully deadpan host Jon Friedman).

Origin

1940s: apparently a fanciful formation based on super, popularized by the 1964 film Mary Poppins.

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Word of the day flippant
Pronunciation: ˈflɪp(ə)nt
adjective
not showing a serious or respectful attitude