a flag longer than it is wide (and often tapering)
source: WordNet 3.0
a long flag; often tapering
source: WordNet 3.0
A small flag; a pennon. The narrow, or long, pennant (called also whip or coach whip) is a long, narrow piece of bunting, carried at the masthead of a government vessel in commission. The board pennant is an oblong, nearly square flag, carried at the masthead of a commodore's vessel.