Meanings
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1
noun
speech or writing that is unintelligible, incoherent, or meaningless
The corrupted file displayed a page of gibberish instead of readable text.
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2
noun
language dismissed as needlessly obscure or excessively technical
Without an explanation, the legal terminology sounded like gibberish to me.
Thesaurus
Etymology
Attested from the mid-16th century, but its origin is uncertain. It may imitate rapid, unintelligible chatter and may have been influenced by jabber; the ending -ish makes it sound like the name of a language. The verb gibber may be a later back-formation.