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[hev-ee-doo-tee, -dyoo-] /ˈhɛv iˈdu ti, -ˈdyu-/
providing an unusual amount of power, durability, etc.:
heavy-duty machinery; heavy-duty shoes.
very important, impressive, or serious:
heavy-duty involvement; heavy-duty questions.
Origin of heavy-duty
First recorded in 1910-15 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for heavy-duty
Contemporary Examples
Historical Examples
  • He ran some heavy-duty motors off it and a few other things like that.

    With No Strings Attached Gordon Randall Garrett (AKA David Gordon)
  • The elder Dr. Arcot glanced in surprise at the heavy-duty ammeter in a control panel.

    Islands of Space John W Campbell
  • A heavy-duty drilling machine performs this work, then the block goes to the lathe for further operations.

    Aviation Engines

    Victor Wilfred Pag
  • The guard was a big man, with a heavy-duty stunner resting in the crook of his elbow.

    Gold in the Sky Alan Edward Nourse
  • He stepped back and to one side and reached for his heavy-duty pencil—the dog gave a low growl of warning and crouched for a leap.

    History Repeats George Oliver Smith
British Dictionary definitions for heavy-duty


noun (modifier)
made to withstand hard wear, bad weather, etc: heavy-duty uniforms
subject to high import or export taxes
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for heavy-duty

"durable, strong," 1914; see heavy + duty.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for heavy-duty



Very active; highly productive: The sting identified 46 ''heavy-duty taggers''

[1940s+; fr the term for a particularly strong and durable machine, found by 1914]

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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