From Longman Dictionary of Contemporary Englishweightliftingweight‧lift‧ing /ˈweɪtˌlɪftɪŋ/ noun [uncountable] DSOthe sport of lifting specially shaped pieces of metal that weigh an exact amount —weightlifter noun [countable]
Examples from the Corpus
weightlifting• Running is obviously an aerobic activity while weightlifting is anaerobic. 