heav·y·weight 
(hĕvē-wāt′)
(hĕvē-wāt′)n.
1. One of above average weight.
2.
a. The heaviest weight division in professional boxing, having no upper limit, with contestants usually weighing more than 200 pounds (90.7 kilograms).
b. A boxer competing in this weight division.
c. A similar weight division in other sports, such as weightlifting.
d. A contestant in this weight division.
3. Informal A person of great importance or influence.
heavy·weight′ adj.
- hydrochloric acid
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