Definition of precaution written for English Language Learners from the Merriam-Webster Learner's Dictionary with audio pronunciations, usage examples, and count/noncount noun labels. Learner's Dictionary mobile search
Freebase(0.00 / 0 votes)Rate this definition: Mutt and Jeff. Mutt and Jeff was a long-popular American newspaper comic strip created by cartoonist Bud Fisher in 1907 about two mismatched tinhorns.. It is commonly regarded as the first daily comic strip.
noun. The definition of a mutt is a dog that does not have a pedigree. A mixed breed dog you get at the pound is an example of a mutt.