fixing in WordNet English dictionary

1. the sterilization of an animal
   "they took him to the vet for neutering"
   neutering  fixing  altering 
   
2. restraint that attaches to something or holds something in place
   fastener  fastening  holdfast  fixing 
   
3. the act of putting something in working order again
   repair  fix  fixing  fixture  mend  mending  reparation 
   
4. (histology) the preservation and hardening of a tissue sample to retain as nearly as possible the same relations they had in the living body
   fixation  fixing