'Spinnaker' definitions:
Definition of 'spinnaker'
(from WordNet)
noun
A large and usually triangular headsail; carried by a yacht as a headsail when running before the wind
Definition of 'Spinnaker'
From: GCIDE
- Spinnaker \Spin"na*ker\ (sp[i^]n"n[.a]*k[~e]r), n. (Naut.) A large triangular sail set upon a boom, -- used when running before the wind. [1913 Webster]