| 1. | the tail of a swallow or a deeply forked tail like that of a swallow. |
| 2. | any of several butterflies of the genus Papilio, characterized by elongated hind wings that resemble the tail of a swallow, as P. polyxenes (black swallowtail). Compare spicebush swallowtail, tiger swallowtail, zebra swallowtail. |
| 3. | tail coat. |
swal·low·tail (swŏl'ŏ-tāl') n.
|