(1921-89) a very successful US boxer who was world champion in the 1940s and 1950s, first as a welterweight (=boxer weighing between 63.5 and 66.5 kilos), and then as a middleweight (=boxer weighing between 70 and 72.5 kilos)
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.
Dictionary pictures of the day
Do you know what each of these is called?
Click on any of the pictures above to find out what it is called.