- having a deeply forked tail like that of a swallow, as various birds.
- having an end or part suggesting a swallow's tail.
- (of a flag) having a triangular indentation in the fly so as to create two tails.
Origin of swallow-tailed
First recorded in 1690–1700
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for swallow-tailed
I should have liked the chance of catching a swallow-tailed butterfly for my collection.'Chatterbox, 1905.
An armorial lance flag, pointed or swallow-tailed at the fly.The Handbook to English Heraldry
The Pennon is a small, narrow flag, forked or swallow-tailed at its extremity.
The beaver hat and swallow-tailed coat were kept in the lead.Negro Tales
Joseph Seamon Cotter
The commodore's broad pendant is a very similar flag, but it tapers slightly, and is swallow-tailed.
- (of a bird) having a deeply forked tail
- having a part resembling a swallow's tail