disintegration

Etymology

It is formed from English disintegrate + -ation, as a noun of action.^[2][3][4] Disintegrate is formed from dis- and integrate,^[2][3][4][5] which is from Latin integrātus (“made whole”), the past participle of integrō (“to make whole”),^[4][2] from integer (“whole, complete”).^[4][2]

Earliest recorded meaning

The wearing down of rock by the weather and similar forces: 1794, in R. Kirwan's Elements of Mineralogy.^[2] Etymonline likewise calls the word originally geological, but dates it to 1796.^[4]

Semantic evolution

The word began as a term of geology, and its verb appears in the same book by Kirwan, a few pages later.^[2][4] A figurative use, for the breaking up of something not material, is recorded from 1849, in H. Martineau.^[2] The Shorter Oxford illustrates the two sides with the atmospheric disintegration of cliffs and the disintegration of authority.^[3] Merriam-Webster Unabridged has the disintegration of personality as well.^[5] In the early 20th century the word was applied to physics, for a nucleus that emits particles or splits and for the decay of a subatomic particle,^[3][5] as was the verb: Soddy used it of a radioactive substance in 1904 and Rutherford used it transitively of a nucleus in 1920.^[2]

Timeline

• 1794 – the breaking up of a substance into particles, especially of rock in geology.^[2] Etymonline dates the word to 1796.^[4]
• 1849 – figurative, the loss of unity or cohesion.^[2]
• early 20th century – in physics, the change of a nucleus by emitting particles or splitting; the decay of a subatomic particle.^[3]

Meanings

Noun

1. The act or process of breaking up into parts or fragments, or the state of having done so: The disintegration of the old paintwork took only a few winters.^[5][2][3]
2. Loss of unity or cohesion in something not material: the disintegration of the alliance.^[2][3][5]
3. (geology) The wearing down of rock by rain, frost and other effects of the atmosphere.^[2]
4. (physics) A change in an atomic nucleus, either spontaneous, as in radioactivity, or caused by bombardment with particles.^[5][2][3]
5. (physics) The change of an elementary particle into others; decay.^[5][3]

Word family

• nondisintegration
• photodisintegration

Related words

• integration
• disintegrate
• integrate
• integer

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l m n Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f g h i Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
4. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
5. ^ a b c d e f g Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster