'Mouthful' definitions:

Definition of 'mouthful'

From: WordNet
noun
The quantity that can be held in the mouth
noun
A small amount eaten or drunk; "take a taste--you'll like it" [syn: taste, mouthful]

Definition of 'Mouthful'

From: GCIDE
  • Mouthful \Mouth"ful\, n.; pl. Mouthfuls.
  • 1. As much as is usually put into the mouth at one time. [1913 Webster]
  • 2. Hence, a small quantity. [1913 Webster]
  • 3. A statement that has a profound truth in it; as, you said a mouthful! [informal] [PJC]

Synonyms of 'mouthful'

From: Moby Thesaurus