heavyweight

adjective

1. heavy in weight.
2. of more than average weight or thickness: a coat of heavyweight material.
3. noting or pertaining to a boxer, wrestler, etc., of the heaviest competitive class, especially a professional boxer weighing more than 175 pounds (79.4 kg).
4. of or relating to the weight class or division of such boxers: a heavyweight bout.
5. (of a riding horse, especially a hunter) able to carry up to 205 pounds (93 kg).
6. designating a person, company, nation, or other entity that is extremely powerful, influential, or important: a team of heavyweight lawyers.

noun

7. a person of more than average weight.
8. a heavyweight boxer or wrestler.
9. a person, company, nation, or other entity that is powerful and influential: a price hike initiated by the heavyweights in the industry.

noun

1. a person or thing that is heavier than average
2. 1. a professional boxer weighing more than 175 pounds (79 kg)
   2. an amateur boxer weighing more than 81 kg (179 pounds)
   3. (as modifier)the world heavyweight championship
3. a wrestler in a similar weight category (usually over 214 pounds (97 kg))
4. informal an important or highly influential person