[hev-ee-doo-tee, -dyoo-]


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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for heavy-duty

Contemporary Examples of heavy-duty

Historical Examples of heavy-duty

  • 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, etcheavy-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

Word Origin and History for heavy-duty

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

Online Etymology Dictionary, © 2010 Douglas Harper