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]

The Free On-line Dictionary of Computing (19 January 2023):

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)