Learn how to say Accordions correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word accordion:
a musical instrument played by stretching and squeezing with the hands to work a central bellows that blows air over metal reeds, the melody and chords being sounded by buttons or keys: Compare with concertina.
her five brothers and sisters were singing to the accompaniment of an accordion
an accordion player
[as modifier] folding like the bellows of an accordion:
an accordion pleat
mid 19th century: from German Akkordion, from Italian accordare ‘to tune’