Dictionary

heavy–duty

adjective heavy–du·ty \ˈhe-vē-ˈdü-tē, -ˈdyü-\

: designed to do difficult work without breaking

: very intense or serious

Full Definition of HEAVY-DUTY

1
:  able or designed to withstand unusual strain <heavy–duty trucks>
2
:  intensive <heavy–duty bargaining>
3
:  important, prominent <heavy–duty lawyers>
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First Known Use of HEAVY-DUTY

1914

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