The Collaborative International Dictionary of English v.0.48:

Coif \Coif\ (koif or kw[aum]f), v. t. [Cf. F. coiffer.]
   To cover or dress with, or as with, a coif.
   [1913 Webster]

         And coif me, where I'm bald, with flowers. --J. G.
                                                  Cooper.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Coif \Coif\ (koif or kw[aum]f), n. [OF. coife, F. coiffe, LL.
   cofea, cuphia, fr. OHG. kuppa, kuppha, miter, perh. fr. L.
   cupa tub. See Cup, n.; but cf. also Cop, Cuff the
   article of dress, Quoif, n.]
   1. A cap. Specifically:
      (a) A close-fitting cap covering the sides of the head,
          like a small hood without a cape.
      (b) An official headdress, such as that worn by certain
          judges in England. [Written also quoif.]
          [1913 Webster]

                From point and saucy ermine down
                To the plain coif and russet gown. --H. Brocke.
          [1913 Webster]

                The judges, . . . althout they are not of the
                first magnitude, nor need be of the degree of
                the coif, yet are they considerable. --Bacon.
          [1913 Webster]

   2. a coiffure.
      [PJC]

WordNet (r) 3.0 (2006):

coif
    n 1: the arrangement of the hair (especially a woman's hair)
         [syn: hairdo, hairstyle, hair style, coiffure,
         coif]
    2: a skullcap worn by nuns under a veil or by soldiers under a
       hood of mail or formerly by British sergeants-at-law
    v 1: cover with a coif
    2: arrange attractively; "dress my hair for the wedding" [syn:
       dress, arrange, set, do, coif, coiffe,
       coiffure]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "coif":
   Afro, barber, bob, bonnet, boot, breech, cap, ceil, cloak, coat,
   coiffure, cold wave, conk, cork, crown, dome, frock, gown, haircut,
   hairdo, hairstyle, hat, headdress, home permanent, hood, jacket,
   mantle, natural, permanent, permanent wave, pompadour, process,
   roof, roof in, shingle, shirt, shoe, sock, stocking, stopper, tip,
   top, trim, wave



The Free On-line Dictionary of Computing (30 December 2018):

COIF

    Fortran with interactive graphic extensions for
   circuit design, on UNIVAC 1108.

   ["An Interactive Software System for Computer-Aided Design: An
   Application to Circuit Projects", CACM 9(13), Sep 1970].

   (1995-01-04)


Bouvier's Law Dictionary, Revised 6th Ed (1856):

COIF. A head-dress. In England there are certain serjeants at law, who are
called serjeants of the coif, from the lawn coif they wear on their heads
under their thin caps when they are admitted to that order.