- vertical stabilizer, vertical stabiliser, vertical fin, tail fin, tailfin - a stabilizer that is part of the vertical tail structure of an airplane
--1 is a kind of stabilizer
--1 is a part of vertical tail - tail fin, tailfin, fin - one of a pair of decorations projecting above the rear fenders of an automobile
--2 is a kind of decoration, ornament, ornamentation
--2 is a part of car, auto, automobile, machine, motorcar