say it: pee-AN-oh
piano is a noun, adjective and adverb meaning "a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds". It carries 4 recorded senses.
a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds
(used chiefly as a direction or description in music) soft; in a quiet, subdued tone
“the piano passages in the composition”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for piano come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.