Read the dictionary definition of lightweight. All definitions for this word.
1. a professional boxer who weighs between 131 and 135 pounds
2. a wrestler who weighs 139-154 pounds
3. an amateur boxer who weighs no more than 132 pounds
4. someone who is unimportant but cheeky and presumptuous
5. weighing relatively little compared with another item or object of similar use
1. a lightweight fabric
2. lightweight wood
6. having no importance or influence
1. a lightweight intellect