The Collaborative International Dictionary of English v.0.48:

Ligature \Lig"a*ture\ (l[i^]g"[.a]*t[-u]r), v. t. (Surg.)
   To ligate; to tie.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ligature \Lig"a*ture\ (l[i^]g"[.a]*t[-u]r; 135), n. [L.
   ligatura, fr. ligare, ligatum, to bind: cf. F. ligature. Cf.
   Ally, League, Legatura, Liable, Ligament.]
   1. The act of binding.
      [1913 Webster]

   2. Anything that binds; a band or bandage.
      [1913 Webster]

   3. (Surg.)
      (a) A thread or string for tying the blood vessels,
          particularly the arteries, to prevent hemorrhage.
      (b) A thread or wire used to remove tumors, etc.
          [1913 Webster]

   4. The state of being bound or stiffened; stiffness; as, the
      ligature of a joint.
      [1913 Webster]

   5. Impotence caused by magic or charms. [Obs.]
      [1913 Webster]

   6. (Mus.) A curve or line connecting notes; a slur.
      [1913 Webster]

   7. (Print.) A double character, or a type consisting of two
      or more letters or characters united, as [ae], [filig],
      [ffllig].
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Logotype \Log"o*type\, n. [Gr. lo`gos word + -type.] (Print.)
   A single type, containing two or more letters; as, [ae],
   \[oe], [AE], [filig], [fllig], [ffllig], etc.; -- called also
   ligature.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ligature
    n 1: (music) a group of notes connected by a slur
    2: character consisting of two or more letters combined into one
    3: a metal band used to attach a reed to the mouthpiece of a
       clarinet or saxophone
    4: thread used by surgeons to bind a vessel (as to constrict the
       flow of blood)
    5: something used to tie or bind [syn: binder, ligature]
    6: the act of tying or binding things together [syn: tying,
       ligature]

Moby Thesaurus II by Grady Ward, 1.0:

98 Moby Thesaurus words for "ligature":
   accent, accent mark, ascender, back, bar, bastard type, beard,
   belly, bevel, black letter, body, braid, brail, cable, cancel, cap,
   capital, case, character, cord, counter, custos, descender, direct,
   dot, em, en, expression mark, face, fat-faced type, feet, fermata,
   font, groove, hold, italic, key signature, knot, lead, letter,
   ligament, ligation, line, link, logotype, lower case, majuscule,
   mark, measure, metronomic mark, minuscule, nexus, nick, notation,
   pause, pi, pica, point, presa, print, roman, rope, sans serif,
   script, segno, shank, shoulder, sign, signature, slur, small cap,
   small capital, spun yarn, stamp, stem, string, swell, symbol,
   tempo mark, tendon, thong, tie, time signature, twine, twist, type,
   type body, type class, type lice, typecase, typeface, typefounders,
   typefoundry, upper case, vinculum, wire, yarn, yoke