A word said by magicians when performing a magic trick. The magician waved his wand and said 'abracadabra' before pulling a rabbit out of the hat.
A mystical word or phrase used to invoke magical powers or as a charm. The ancient scroll contained the word 'abracadabra' as part of a spell for protection.
Meaningless talk; jargon or gibberish that is difficult to understand. All that technical abracadabra went right over my head.