Noun harmonica has 1 sense

1. harmonica, mouth organ, harp, mouth harp - a small rectangular free-reed instrument having a row of free reeds set back in air holes and played by blowing into the desired hole
   --₁ is a kind of free-reed instrument
   

Harmonica

A harmonica is a small, rectangular musical instrument that is played by blowing and drawing air through reeds, which vibrate to produce sound.

Noun:

1. A wind instrument usually consisting of metal reeds in an airtight casing.

Example sentence: I learned to play the harmonica during quarantine.

2. A small, portable harmonica often referred to as a "mouth organ".

Example sentence: The harmonica player impressed the crowd with his bluesy tunes.

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