Dictionary:

backcross

  (băk'krôs', -krŏs')

To cross (a hybrid) with one of its parents or with an individual genetically identical to one of its parents.

1. The act of making such a cross.
2. An individual resulting from such a cross.

To cross a hybrid with one of its parents, or with an individual genetically identical to one of its parents.

1. The act of making such a cross.
2. An individual resulting from such a cross.

Mating the crossbred offspring of a two-way cross back to one of the parent breeds.

A plant derived from a cross between a hybrid and one of its parents.

The verb has one meaning:

Meaning #1: mate a hybrid of the first generation with one of its parents