backbone

American  

[bak-bohn] / ˈbækˌboʊn /

noun

• backbones
  plural

1. Anatomy. the spinal column; spine.

2. strength of character; resolution.

   Synonyms:

   fortitude, decision, firmness

3. something resembling a backbone in appearance, position, or function.

4. Bookbinding. a back or bound edge of a book; spine.

5. Nautical. a rope running along the middle of an awning, as a reinforcement and as an object to which a supporting bridle or crowfoot may be attached.

6. Naval Architecture. the central fore-and-aft assembly of the keel and keelson, giving longitudinal strength to the bottom of a vessel.

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backbone British  

/ ˈbækˌbəʊn /

noun

1. a nontechnical name for spinal column

2. something that resembles the spinal column in function, position, or appearance

3. strength of character; courage

4. the main or central mountain range of a country or region

5. nautical the main longitudinal members of a vessel, giving structural strength

6. computing (in computer networks) a large-capacity, high-speed central section by which other network segments are connected

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backbone Scientific  

/ băk′bōn′ /

1. See vertebral column

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backbone Cultural  

1. The primary line(s) that connects the slower, shorter cable portions of a communications network together. (See last mile.) In larger networks, such as the Internet, a backbone consists of high-capacity, high-speed lines that can extend over great distances.

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Other Word Forms

Derived Forms

• backboned
  adjective
• backboneless
  adjective

Inflected Forms

Nouns

• backbones
  plural

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Etymology

Origin of backbone

1250–1300; Middle English bacbon. See back ¹, bone ( def. )

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Example Sentences

See Examples For:

backbone backbones

The researchers examined 27 fossilized vertebrae, the individual bones that make up a snake's backbone.

From Science Daily ● Oct. 14, 2026

America’s manufacturing sector employs some 13 million people and forms the backbone of our nation’s supply chain, including for national defense goods.

From The Wall Street Journal ● Oct. 13, 2026

As a Catholic, Abbott has also managed to keep a discrete distance from the evangelicals who are the backbone of the Christian nationalist movement.

From Salon ● Oct. 13, 2026

While the rising cost of diesel directly hits drivers, there's a wider concern because of its use in the lorries, vans and ships that form the backbone of global supply chains.

From BBC ● Oct. 12, 2026

Though I kept insisting that we should keep the backbone in the center, I knew none of my reasons held water.

From "Double Helix" by James D. Watson

The chart shows strongly performing security and infrastructure, which provides “critical data backbones, compute pipelines and complex protection systems that generative models actively expand rather than displace.”

From MarketWatch ● Jul. 27, 2026

Tanyka belongs to a broad group of vertebrates known as tetrapods, which includes all four-limbed animals with backbones such as reptiles, birds, mammals, and amphibians.

From Science Daily ● May 1, 2026

For decades, palaeontologists believed that the largest ocean predators were vertebrates with backbones such as fish and reptiles while invertebrates like octopuses and squid played supporting roles.

From BBC ● Apr. 23, 2026

Animals without a backbones evolved first, around 700 million years ago.

From The Wall Street Journal ● Nov. 21, 2025

Turner sat on the stool, and he heard her settle backbones creaking and snapping.

From "Lizzie Bright and the Buckminster Boy" by Gary D. Schmidt

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Related Words

• foundation
• spine

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