Swal·low-tailed a.
 1. Having a tail like that of a swallow; hence, like a swallow's tail in form; having narrow and tapering or pointed skirts; as, a swallow-tailed coat.
 2. Carp. United by dovetailing; dovetailed.
 Swallow-tailed duck Zool., the old squaw.
 Swallow-tailed gull Zool., an Arctic gull (Xema furcata), which has a deeply forked tail.
 Swallow-tailed hawk or Swallow-tailed kite Zool., the fork-tailed kite.
 Swallow-tailed moth Zool., a European moth (Urapteryx sambucaria) having tail-like lobes on the hind wings.
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