The noun breed has 4 senses (first 2 from tagged texts)
1. (5) breed -- (a special lineage; "a breed of Americans")
2. (1) breed, strain, stock -- (a special variety of domesticated animals within a species; "he experimented on a particular breed of white rats"; "he created a new strain of sheep")
3. half-breed, breed -- (half-caste offspring of parents of different races (especially of white and American Indian parents))
4. breed, strain -- (a lineage or race of people)
Overview of verb breed
The verb breed has 4 senses (first 2 from tagged texts)
1. (1) engender, breed, spawn -- (call forth)
2. (1) breed, cover -- (copulate with a female, used especially of horses; "The horse covers the mare")
3. breed -- (cause to procreate (animals); "She breeds dogs")
4. breed, multiply -- (have young (animals); "pandas rarely breed in captivity")