plural pianos
: a large musical instrument with a keyboard that you play by pressing black and white keys and that produces sound when small hammers inside the piano hit steel wires
Do you play the piano?
a concerto that is played on the piano = a piano concerto
a piano player [=pianist]
He takes piano lessons on Wednesdays.
piˈɑːnoʊ
music
: quietly or softly
Cite this Entry
“Piano.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/piano. Accessed 14 Apr. 2026.
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