- 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. 2018
Examples from the Web for heavy-duty
Increasing fuel-economy standards for heavy-duty vehicles is, too.Obama’s Bad Salesmanship
June 25, 2013
He always brought a heavy-duty hockey duffel with him to work, but he hit the gym more often and toned down.Britney Spears and Jason Trawick: He’s Her Fiancé, Manager, and Conservator
September 11, 2012
Two rebel commanders tell Eli Lake they could oust Assad within a month—if the U.S. supplies them with some heavy-duty weapons.Syrian Opposition Leaders: We Need U.S. Weapons
July 23, 2012
Cover the roasting pan with a fitted top or heavy-duty aluminum foil.
Remove the roasting pan from the heat and carefully cover it with a fitted lid or heavy-duty aluminum foil.
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
- made to withstand hard wear, bad weather, etcheavy-duty uniforms
- subject to high import or export taxes
Word Origin and History for heavy-duty
Online Etymology Dictionary, © 2010 Douglas Harper