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English definition of “lightweight”

lightweight

adjective  /ˈlɑɪtˌweɪt/ us  

lightweight adjective (WITH LESS WEIGHT)

(esp. of clothes) weighing little and therefore not warm: a lightweight jacket

lightweight adjective (NOT IMPORTANT)

(of a person) of little importance, or (of ideas) created without serious thought or purpose: The movie was a lightweight comedy.

lightweight

noun [C]  /ˈlɑɪt·weɪt/ us  

lightweight noun [C] (SOMEONE OR SOMETHING NOT IMPORTANT)

a person of little importance, or an idea created without serious thought or purpose:
(Definition of lightweight from the Cambridge Academic Content Dictionary © Cambridge University Press)
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