noun, plural: mongrels
(1) An animal of mixed or indeterminate breed, especially a dog.
(2) A plant resulting from the cross of different varieties.
Of or pertaining to an animal or plant of mixed kind or of uncertain origin.
A mongrel is originally used to refer to a dog of unknown or mixed breed as opposed to purebred. The term is now used to denote other animals and plants of mixed or indeterminate breeds or varieties.
Word origin: Middle English, probably from mong, mixture.
Synonym: hybrid, mutt (colloquial, especially a mongrel dog).