noun mouth·ful \ˈmath-ˌfl\

: as much as a mouth will hold

: a word, name, or phrase that is very long or difficult to say

: something said that has a lot of meaning or importance

Full Definition of MOUTHFUL

a :  as much as a mouth will hold
b :  the quantity usually taken into the mouth at one time
:  a small quantity
a :  a very long word or phrase
b :  a comment or a statement rich in meaning or substance

Examples of MOUTHFUL

  1. It was a delicious meal. We enjoyed every mouthful.
  2. His last name is a real mouthful.

First Known Use of MOUTHFUL

15th century


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