Definitions for "Spinnaker"
A large triangular sail set upon a boom, -- used when running before the wind.
A large triangular sail which may have a light boom.
Large beautiful balloon shaped sail used in powerful downwind sailing, collapses at the sides to make control difficult and when lowered stores neatly into the galley and main cabin and heads all at the same time.
a type of airfoil and does generate lift , contrary to a popular belief