Source : Webster's Revised Unabridged Dictionary (1913)

Ligate \Li"gate\ (l[imac]"g[=a]t), v. t. [L. ligatus, p. p. of
   ligare.]
   To tie with a ligature; to bind around; to bandage.

Source : WordNet®

ligate
     v 1: join letters in a ligature when writing
     2: bind chemically; "The enzyme ligated"
     3: bind with a bandage or ligature; "ligate the artery"