what does mouth harp mean?

MOUTH HARP as NOUN

Meaning
- 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
Synonym(s)
- harmonica (what does harmonica mean?)
- harp (what does harp mean?)
- mouth organ (what does mouth organ mean?)
Hypernyms(s) mouth harp is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- free-reed instrument (what does free-reed instrument mean?)
Derived(s)
- harp (what does harp mean?)