lightweight (lightweights plural ), light-weight
1 adj Something that is lightweight weighs less than most other things of the same type.
...lightweight denim...
n-uncount Lightweight is a category in some sports, such as boxing, judo, or rowing, based on the weight of the athlete.
By the age of sixteen he was the junior lightweight champion of Poland...
A lightweight is a person who is in the lightweight category in a particular sport., n-count
3 n-count If you describe someone as a lightweight, you are critical of them because you think that they are not very important or skilful in a particular area of activity., (disapproval, Antonym: heavyweight)
Hill considered Sam a lightweight, a real amateur.
Lightweight is also an adjective., adj