harness

1 of 2

noun

har·​ness ˈhär-nəs 

1

a

: the equipment other than a yoke of a draft animal

b

: gear, equipment

especially : military equipment for a horse or man

2

a

: occupational surroundings or routine

get back into harness after a vacation

b

: close association

… ability to work in harness with others …

—R. P. Brooks

3

a

: something that resembles a harness (as in holding or fastening something)

a parachute harness

b

: prefabricated wiring with insulation and terminals (see terminal entry 2 sense 3) ready to be attached (as in an ignition or lighting system)

a wiring harness

4

: a part of a loom which holds and controls the heddles

harness

2 of 2

verb

harnessed; harnessing; harnesses

transitive verb

1

a

: to put a harness on

harnessed the ox

b

: to attach by means of a harness

harness the horses to the wagon

2

: to tie together : yoke

… must harness his mechanical apparatus to his creative mind …

—Andrew Buchanan

3

: utilize

harness the technology's potential

Synonyms of harness

Verb

• use
• utilize
• exploit
• apply
• employ

Examples of harness in a Sentence

Noun

The pilot strapped himself into his harness before takeoff.

Verb

The horses were harnessed to the wagon.

Engineers are finding new ways to harness the sun's energy to heat homes.

The company is harnessing technology to provide better service to its customers.

They harnessed the power of the waterfall to create electricity.

harness anger to fight injustice

Recent Examples on the Web

Noun

And just in time for holiday shopping, Amazon has found a way to harness all those likes into an easy shopping experience. —Sian Babish, PEOPLE, 25 Nov. 2025

Laduora’s handheld device harnesses the power of red LED light, microcurrent, heat therapy, and vibrational massage in a daily, five-minute treatment. —Brianna Peters, Vogue, 24 Nov. 2025

Verb

His obsession with harnessing power from and control over these superpowered kids, and his obsession with using Eleven to find Henry/One/Vecna in the Upside Down, are really at the root of everything else that happens in Stranger Things. —Maggie Fremont, Vulture, 24 Nov. 2025

The backers of Ashes to Films aim to harness the idea that creativity and the arts help people heal after intense trauma. —Cynthia Littleton, Variety, 22 Nov. 2025

Word History

Etymology

Noun

Middle English harneys, herneys "equipment of a man-at-arms, body armor, fittings for a draft animal, apparel, baggage," borrowed from Anglo-French herneis, harneis (also continental Old French), probably borrowed from Old Norse *hernest "provisions for an armed force," from herr "host, army" + nest "provisions," going back to Germanic *nesta- (whence also Old English nest "food, provisions," Old High German -nest, in weganest "provisions for a journey"), derivative, with the noun and adjective suffix -to-, from the base of *nesan- "to save, be saved, return safely" — more at harry, nostalgia

Note: The Norse word was presumably assimilated to the French nominal and adjectival suffix -eis (going back to Latin -ēnsis; compare -ese entry 1), so that the compound was resegmented as harn-eis.

Verb

Middle English harneysen, harneyschen, hernessen "to equip with arms or armor, place accoutrements on a horse or ox, dress," borrowed from Anglo-French harneiser, herneiser, hernescher "to make ready, equip" (continental Old French harneschier, herneschier), derivative of harneis "equipment of a man-at-arms, baggage" — more at harness entry 1

First Known Use

Noun

14th century, in the meaning defined at sense 1a

Verb

14th century, in the meaning defined at sense 1a

Phrases Containing harness

• harness horse
• harness racing
• in harness
• shoulder harness

Kids Definition

harness

1 of 2 noun

har·​ness ˈhär-nəs 

1

: the straps and fastenings by which an animal pulls a load

2

: an arrangement that resembles a harness

harness

2 of 2 verb

1

: to put a harness on

2

: to tie together : yoke

3

: to put to work : utilize

harness the sun's energy to heat homes