Meaning

• A person who breeds plants or animals (professionally).

• A person who has had or who is capable of having children; a person who is focussed on the rearing of their own children.

• A heterosexual; i.e. one whose sexual intercourse can lead to breeding.

  "Since the breeders started coming here, you can never tell who likes cock."

• Ellipsis of breeder reactor; a type of nuclear reactor that creates material suitable for the production of atomic weapons.

• A pattern that exhibits quadratic growth by generating multiple copies of a secondary pattern, each of which then generates multiple copies of a tertiary pattern.