Definition from Wiktionary, the free dictionary
- To impact directly, especially if violent
- When a body collides with another, then momentum is conserved.
- Across this space the attraction urges them. They collide, they recoil, they oscillate.
- No longer rocking and swaying, but clashing and colliding.
- 2012 June 2, Phil McNulty, “England 1-0 Belgium”, BBC Sport:
- And this friendly was not without its injury worries, with defender Gary Cahill substituted early on after a nasty, needless push by Dries Mertens that caused him to collide with goalkeeper Joe Hart, an incident that left the Chelsea defender requiring a precautionary X-ray at Wembley.
- To come into conflict, or be incompatible
- Tibet collided with the modern world.
Related terms 
to impact directly, especially if violent
to come into conflict, or be incompatible
- The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.
Translations to be checked
- collide in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
- collide in The Century Dictionary, The Century Co., New York, 1911
- third-person singular present indicative of collidere
- second-person singular present active imperative of collīdō