harness.
A restraint or support, especially one consisting of a loop or network of rope or straps, and especially one worn by a working animal such as a horse pulling a carriage or farm implement.
Meaning & usage
A restraint or support, especially one consisting of a loop or network of rope or straps, and especially one worn by a working animal such as a horse pulling a carriage or farm implement.
A collection of wires or cables bundled and routed according to their function: a wiring harness.
The complete dress, especially in a military sense, of a man or a horse; armour in general.
The part of a loom comprising the heddles, with their means of support and motion, by which the threads of the warp are alternately raised and depressed for the passage of the shuttle.
Equipment for any kind of labour.
A software framework.
test harness
A software framework. A system designed to manage the use of AI agents, specifically in software development.
harness engineering
Where this word comes from
From Middle English harneys, harnes, harneis, harnais, herneis, from Anglo-Norman harneis and Old French hernois (“equipment used in battle”), believed to be from Old Norse *hernest, from herr (“army”) + nest (“provisions”) (from Proto-Germanic *nesaną (“to heal, recover”)). More at harry.
To place a harness on something; to tie up or restrain.
They harnessed the horse to the post.
To capture, control or put to use.
Imagine what might happen if it were possible to harness solar energy fully.
To equip with armour.
Where this word comes from
From Middle English harneys, harnes, harneis, harnais, herneis, from Anglo-Norman harneis and Old French hernois (“equipment used in battle”), believed to be from Old Norse *hernest, from herr (“army”) + nest (“provisions”) (from Proto-Germanic *nesaną (“to heal, recover”)). More at harry.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.