bifocal Syllabification: (bi·fo·cal)Pronunciation: /ˈbīˌfōkəl/Translate bifocal | into German Definition of bifocal adjective (usually of a pair of eyeglasses) having lenses each with two parts with different focal lengths, one for distant vision and one for near vision. noun (bifocals) a pair of eyeglasses having lenses with two parts with different focal lengths. bifocal in other Oxford dictionaries Definition of bifocal in the British & World English dictionary