Longman Dictionary of Contemporary English
Douglas Harper's Etymology Dictionary
Wiktionary
a. Designed to withstand hard usage without breaking.
WordNet
adj. designed for heavy work; "a heavy-duty detergent"; "heavy-duty gloves" [ant: light-duty]
Usage examples of "heavy-duty".
Within a few hours, demicannons and culverins were being rowed to the beach, heaved ashore in heavy-duty cargo nets, then winched to the cliff-top by sailors who did not lack for a host of willing, helpful hands and arms and backs from the men of Benchor and others come in from the smaller settlements and holdings round about Lough Loig.
Somewhere in the system, a heavy-duty demodulator kept the whole radiation mechanism safe.
Heavy-duty disintegrators were immediately set up at these places and heavily armed men spread out from them to search the surrounding terrain, their gillars running ahead of them.
Lydis was flying a heavy-duty space tuga comet chaserinstead of one of the lightweight interbranch shuttles.
On both bows were catapults, across the after third stretched the cables of the arresting gear, and forward, aft, and amidships a heavy-duty elevator took planes from the flight deck to the cavernous hangar deck below it, crammed with parked aircraft and lined with shops for storage, repair or rearming.
Heavy-duty drugs that open you to the helpful remedial posthypnotic suggestions of our staff psychologists.
I sealed the kitchen door behind me with the turnbuckle, zipped my jacket all the way up to my nose, took the heavy-duty flashlight from its perch near the chainsaw, and thumbed open the latch of the outside door.
The darkness in the park was alive with large-caliber muzzle flashes and evanescent fire-flowers that could only come from heavy-duty autofire weapons.
These passages were populated by burlier sorts, lumbering heavy-duty machines in dun colors.
And everybody knew he was facing 23 heavy-duty charges involving bogus sales of condominiums and houses.
Shreck and his cameraman Flynn, wrapped in heavy-duty furs, lumbered out into the cold, swore briefly, and began filming.
What he saw were two gunports opening, and twin heavy-duty phaser cannons snapped into view.
But new, larger herbivores began to evolve, with heavy-duty ridged teeth able to cope with the new, coarser vegetation typical of seasonal woodland.
Some of the attacking rebels were trying to free the prisoners, but the heavy-duty padlocks were slowing them down.
At the base of the cliff, where heavy-duty elevators lowered the slabs of rock, a mag-lev spur delivered cargo platforms that hauled the rock to another section of the village, where the granite was cut, shaped, and polished into usable pieces.