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

Etymology

Origin of backbone

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

Example Sentences

See Examples For:

backbone backbones

What underpins this is a determination to tear up two formulas that have long formed the backbone of how UK governments allocate money.

From BBC ● Jul. 17, 2026

The mythic backbone of “Avatar” is in many ways just as simple.

From Salon ● Jul. 8, 2026

FRANKFURT—For decades, thousands of niche, world-class manufacturers that form the backbone of the German economy relied on an unassailable moat: unmatched quality.

From The Wall Street Journal ● Jul. 4, 2026

Small companies that form the backbone of the German economy are struggling with the shift to carbon-neutral production, which adds extra costs when they are already battling high power prices and a broader slowdown.

From Barron's ● Jul. 2, 2026

Her look sat with a backbone inside it.

From "Girls Like Us" by Gail Giles

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

“If you look at the collection of companies that ultimately formed Lumen, the underlying technologies and backbones were never integrated,” he said.

From MarketWatch ● Mar. 16, 2026

Scientists at the University of St Andrews have identified an important missing piece in understanding how animals with backbones first evolved.

From Science Daily ● Feb. 4, 2026

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

From The Wall Street Journal ● Nov. 21, 2025

In the case of mammals, reptiles, and fish, it would be that they all have backbones.

From "Auggie & Me" by R. J. Palacio

Related Words

• foundation
• spine