bib1 Syllabification: (bib)Pronunciation: /bib/Translate bib | into French | into German | into Italian | into Spanish Definition of bib noun a piece of cloth or plastic fastened around a person’s neck to keep their clothes clean while eating. the part above the waist of the front of an apron or pair of overalls. a loose-fitting, sleeveless garment worn for identification, especially by competitors and officials at sporting events. a patch of color on the throat of a bird or other animal:a black bird with a white bibPhrases one's best bib and tucker informal one’s finest clothes. Origin: late 16th century: probably from bib2bib in other Oxford dictionaries Definition of bib in the British & World English dictionary