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collision

/kəˈlɪʒn̩/ noun B2
  1. An instance of colliding. (countable, uncountable) · He has retired due to the collision.
  2. Any event in which two or more bodies exert forces on each other in a relatively short time. In a collision, physical contact of two bodies is not necessary. (countable, uncountable)

Plural collisions

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From the library

Captivity has brought my mental faculties to a focus; and you are well aware that from the collision of clouds electricity is produced—from electricity, lightning, from lightning, illumination.”
The Count of Monte Cristo, p. 160 · C1
Missed connections were the least of it: on single-track lines, a discrepancy of a few minutes could put two trains on a collision course.
The Day the Clocks Changed, p. 1 · C2
The English spoken in Ireland is a fascinating linguistic tapestry, woven from the historical collision of two very different languages.
The English of Ireland, p. 1 · C1

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.