ˈhɛviˈduːti,
British
ˈhɛviˈdjuːti 
1
: designed to do difficult work without breaking
heavy-duty vehicles/machines
2
US
: very intense or serious
heavy-duty efforts
a heavy-duty conservative
I need to do some heavy-duty studying.
Her plan is facing some heavy-duty opposition.
Cite this Entry
“Heavy-duty.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/heavy-duty. Accessed 14 Apr. 2026.
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