Nonsense is stuff that sounds like language but doesn't have any meaning, like the phrase higgledy-piggledy-po, or fwumphy-doo. The most famous nonsense poem is Lewis Carroll's "Jabberwocky."

Nonsense means exactly what it sounds like: not containing a lick of sense. Nonsense words are made up. But sometimes if you say something in a really confusing way, people will say you're speaking nonsense: even though you're using normal words, you don't make any sense. Sometimes people will dismiss ideas that they don't like by calling them nonsense, but you might know better. Little household knick-knacks that have no purpose are also called nonsense.

Definitions of nonsense

n a message that seems to convey no meaning

bunk, hokum, meaninglessness, nonsensicality
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absurdity, absurdness, ridiculousness
a message whose content is at variance with reason
amphigory, nonsense verse
nonsensical writing (usually verse)
balderdash, fiddle-faddle, piffle
trivial nonsense
buzzword, cant
stock phrases that have become nonsense through endless repetition
nonsense; foolish talk
fa la, fal la
meaningless syllables in the refrain of a partsong
gibber, gibberish
unintelligible talking
incoherence, incoherency, unintelligibility
nonsense that is simply incoherent and unintelligible
nonsensical language (according to Lewis Carroll)
flummery, mummery
meaningless ceremonies and flattery
empty talk, empty words, hot air, palaver, rhetoric
loud and confused and empty talk
rigamarole, rigmarole
a set of confused and meaningless statements
schmegegge, shmegegge
(Yiddish) baloney; hot air; nonsense
hooey, poppycock, stuff, stuff and nonsense
senseless talk
baloney, bilgewater, boloney, bosh, drool, humbug, taradiddle, tarradiddle, tommyrot, tosh, twaddle
pretentious or silly talk or writing
word salad
jumble of incoherent speech as sometimes heard in schizophrenia
gibberish and nonsense
babble, babbling, lallation
gibberish resembling the sounds of a baby
blather, blatherskite
foolish gibberish
double Dutch
an incomprehensible talk
double talk
deliberately unintelligible gibberish
gabble, jabber, jabbering
rapid and indistinct speech
mumbo jumbo
language or ritual causing, or intending to cause, confusion
Type of:
content, message, subject matter, substance
what a communication that is about something is about

n ornamental objects of no great value

falderol, folderal, frill, gimcrack, gimcrackery, trumpery
Type of:
decoration, ornament, ornamentation
something used to beautify

adj having no intelligible meaning

nonsense syllables”
meaningless, nonmeaningful
having no meaning or direction or purpose

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