\Cowl\ (koul), n. [AS. cuhle, cugle, cugele; cf. dial. G.
kogel, gugel, OF. coule, goule; all fr. LL. cuculla,
cucullus, fr. L. cucullus cap, hood; perh. akin to celare to
conceal, cella cell. Cf. {Cucullate}.]
1. A monk's hood; -- usually attached to the gown. The name
   was also applied to the hood and garment together.
         What differ more, you cry, than crown and cowl?
                                               --Pope.
2. A cowl-shaped cap, commonly turning with the wind, used to
   improve the draft of a chimney, ventilating shaft, etc.
3. A wire cap for the smokestack of a locomotive.

\Cowl\, n. [Cf. OF. cuvele, cuvel, dim. of F. cuve tub,
vat, fr. L. cupa. See {Cup}.]
A vessel carried on a pole between two persons, for
conveyance of water. --Johnson.