wool wool /ˈwʊl/

noun

1. () A fabric made from the hair of sheep  ( woollen [Canadian, British] , woolen [ N. American] , wool )
   a fabric made from the hair of sheep
    She wore a wool sweater to keep warm.
   She wore a wool sweater to keep warm.
   
   
2. Outer coat of especially sheep and yaks  ( fleece , wool )
   outer coat of especially sheep and yaks
   
   
3. Fiber sheared from animals (such as sheep) and twisted into yarn for weaving  ( wool )
   fiber sheared from animals (such as sheep) and twisted into yarn for weaving
    The sweater made of soft wool provided warmth during the cold winter months.
   The sweater made of soft wool provided warmth during the cold winter months.