NOUN (2)

1. an odorous glandular secretion from the male musk deer; used as a perfume fixative;

2. the scent of a greasy glandular secretion from the male musk deer;

The Collaborative International Dictionary of English v.0.48:

Musk \Musk\ (m[u^]sk), n. [F. musc, L. muscus, Per. musk, fr.
   Skr. mushka testicle, orig., a little mouse. See Mouse, and
   cd. Abelmosk, Muscadel, Muscovy duck, Nutmeg.]
   1. A substance of a reddish brown color, and when fresh of
      the consistency of honey, obtained from a bag being behind
      the navel of the male musk deer. It has a slightly bitter
      taste, but is specially remarkable for its powerful and
      enduring odor. It is used in medicine as a stimulant
      antispasmodic. The term is also applied to secretions of
      various other animals, having a similar odor.
      [1913 Webster]

   2. (Zool.) The musk deer. See Musk deer (below).
      [1913 Webster]

   3. The perfume emitted by musk, or any perfume somewhat
      similar.
      [1913 Webster]

   4. (Bot.)
      (a) The musk plant (Mimulus moschatus).
      (b) A plant of the genus Erodium (Erodium moschatum);
          -- called also musky heron's-bill.
      (c) A plant of the genus Muscari; grape hyacinth.
          [1913 Webster]

   Musk beaver (Zool.), muskrat (1).

   Musk beetle (Zool.), a European longicorn beetle (Aromia
      moschata), having an agreeable odor resembling that of
      attar of roses.

   Musk cat. See Bondar.

   Musk cattle (Zool.), musk oxen. See Musk ox (below).

   Musk deer (Zool.), a small hornless deer (Moschus
      moschiferus), which inhabits the elevated parts of
      Central Asia. The upper canine teeth of the male are
      developed into sharp tusks, curved downward. The male has
      scent bags on the belly, from which the musk of commerce
      is derived. The deer is yellow or red-brown above, whitish
      below. The pygmy musk deer are chevrotains, as the kanchil
      and napu.

   Musk duck. (Zool.)
      (a) The Muscovy duck.
      (b) An Australian duck (Biziura lobata).

   Musk lorikeet (Zool.), the Pacific lorikeet (Glossopsitta
      australis) of Australia.

   Musk mallow (Bot.), a name of two malvaceous plants:
      (a) A species of mallow (Malva moschata), the foliage of
          which has a faint musky smell.
      (b) An Asiatic shrub. See Abelmosk.

   Musk orchis (Bot.), a European plant of the Orchis family
      (Herminium Minorchis); -- so called from its peculiar
      scent.

   Musk ox (Zool.), an Arctic hollow-horned ruminant (Ovibos
      moschatus), now existing only in America, but found
      fossil in Europe and Asia. It is covered with a thick coat
      of fine yellowish wool, and with long dark hair, which is
      abundant and shaggy on the neck and shoulders. The
      full-grown male weighs over four hundred pounds.

   Musk parakeet. (Zool.) Same as Musk lorikeet (above).

   Musk pear (Bot.), a fragrant kind of pear much resembling
      the Seckel pear.

   Musk plant (Bot.), the Mimulus moschatus, a plant found
      in Western North America, often cultivated, and having a
      strong musky odor.

   Musk root (Bot.), the name of several roots with a strong
      odor, as that of the nard (Nardostachys Jatamansi) and
      of a species of Angelica.

   Musk rose (Bot.), a species of rose (Rosa moschata),
      having peculiarly fragrant white blossoms.

   Musk seed (Bot.), the seed of a plant of the Mallow family
      (Hibiscus moschatus), used in perfumery and in
      flavoring. See Abelmosk.

   Musk sheep (Zool.), the musk ox.

   Musk shrew (Zool.), a shrew (Sorex murinus), found in
      India. It has a powerful odor of musk. Called also
      sondeli, and mondjourou.

   Musk thistle (Bot.), a species of thistle (Carduus
      nutans), having fine large flowers, and leaves smelling
      strongly of musk.

   Musk tortoise, Musk turtle (Zool.), a small American
      fresh-water tortoise (Armochelys odorata syn. Ozotheca
      odorata), which has a distinct odor of musk; -- called
      also stinkpot.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Musk \Musk\ (m[u^]sk), v. t.
   To perfume with musk.
   [1913 Webster]

WordNet (r) 3.0 (2006):

musk
    n 1: an odorous glandular secretion from the male musk deer;
         used as a perfume fixative
    2: the scent of a greasy glandular secretion from the male musk
       deer

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "musk":
   ambergris, ambrosia, aromatic, aromatic gum, aromatic water, attar,
   attar of roses, balm, balm of Gilead, balsam, bay oil,
   bergamot oil, champaca oil, civet, essence, essential oil, extract,
   fixative, heliotrope, jasmine oil, lavender oil, myrcia oil, myrrh,
   parfum, perfume, perfumery, rose oil, scent, volatile oil