'Capful' definitions:

Definition of 'capful'

From: WordNet
noun
The quantity that a cap will hold

Definition of 'Capful'

From: GCIDE
  • Capful \Cap"ful\, n.; pl. Capfuls. As much as will fill a cap. [1913 Webster] +PJC
  • A capful of wind (Naut.), a light puff of wind. [1913 Webster]