lightweight

Universal Words adjective, noun adjective 1 made of thinner material and less heavy than usual: lightweight jackets / boots * a lightweight aluminium engine 2 (disapproving) not very serious or impressive: a lightweight book * He was considered too lightweight for the job. noun 1 a boxer weighing between 57 and 61 kilograms, heavier than a FEATHERWEIGHT: a lightweight champion 2 a person or thing that weighs less than is usual 3 (informal, disapproving) a person or thing of little importance or influence: a political lightweight * He's an intellectual lightweight (= he does not think very deeply or seriously).