Etymologically
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interstate

Etymology and origin of the English word interstate

History Permalink
Confidence
Established
Formation
Compound
First attested
1838
Ultimate origin
English (state)

Pronunciation

  • IPA: UK /ˌɪn.təˈsteɪt/, US /ˈɪn.t̬ɚ.steɪt/[1]

Etymology

It is formed from inter-, between, and state in the American sense.[2][3]

Earliest recorded meaning

Existing or carried on between different states: 1838, in American English, in reference to the traffic in slaves;[2] 1844 in Merriam-Webster, before 1845 in the OED.[3][4]

Semantic evolution

Interstate commerce, carried on between people in different US states, is regulated by Congress under the Constitution.[2] In Australia interstate is used as an adverb, to or from another state, from 1924.[4][5] The noun, an interstate highway, is from 1968 in Merriam-Webster, by 1975 in Etymonline.[3][2]

Timeline

  • 1838 – between states (US).[2]
  • 1924 – to another state (Australia).[4]
  • 1968 – an interstate highway.[3]

Modern meaning

Adjective

  1. Between or involving two or more states, especially of the United States or Australia.

Noun

  1. (US) A highway in the national system linking the states.

Adverb

  1. (Australia) To or in another state.

References

  1. ^ Jones, Daniel (2011), Cambridge English Pronouncing Dictionary, 18th ed., ed. Peter Roach, Jane Setter and John Esling, Cambridge: Cambridge University Press
  2. ^ a b c d e Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  3. ^ a b c d Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  4. ^ a b c Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
  5. ^ Collins English Dictionary (2023), Glasgow: HarperCollins
Cite this entry

“Interstate.” Etymologically, 17 Oct. 2026, etymologically.com/en/interstate. Accessed 17 Oct. 2026.

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