tail

n.

1. The prolongation of the spinal column

   rear end, rear appendage, extremity, stub, hind part, caudal appendage, cauda (Latin), coccyx, brush, scut, flag, dock, rudder*, cue*, fly swatter*, tassel*, wagger*; see also rear.

2. The end of anything, especially if elongated

   last part, hindmost part, tailpiece; see end 4.

   Antonyms origin*, head*, beginning. *

3. The rear of an aircraft].

   Parts in the tail of an airplane include: empennage, tail group, rudder, tail assembly, tail skid, stabilizer, diving rudder, horizontal tail fin, elevator, airfoil.

on one's tail*

turn tail*

with one's tail between one's legs*