Collide vs Run into

When to use each in English, with meaning, register, and examples.

Collide

Top 2,000 (common)C1verb

Run into

Top 2,000 (common)
 CollideRun into
Pronunciation🇬🇧 //kəˈlaɪd//🇺🇸 //kəˈlaɪd//🇬🇧 //rʌn ˈɪntuː//🇺🇸 //rʌn ˈɪntu//
MeaningTo hit or crash into something.to meet someone unexpectedly
ExampleThe two cars collided at the intersection.I ran into an old classmate at the grocery store.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelC1-
Part of speechverb
Collocationscollide with, collide head-on, collide violentlyrun into trouble, run into a friend, run into a problem
Antonymsmerge, combine, connectavoid, miss, evade
Common mistakesConfused with 'combine' - remember, collide means to crash., Using with intransitive structure incorrectly - 'collide with' is the correct form., Overusing in metaphors - ensure it fits the context.Confused with 'run onto', meaning to reach a physical location., Using in the wrong tense, e.g., 'I run into him yesterday.', Confusing with 'bump into', which has a similar meaning.
Usage notesCommonly used in scientific and everyday contexts. Avoid using in overly informal situations.Use 'run into' when meeting someone by chance. It is appropriate in casual conversations but can also be used in more formal settings, though alternatives like 'encounter' may be preferred.

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Run into

Frequently asked questions: Collide vs Run into

What's the difference between Collide and Run into?

Collide: To hit or crash into something. Run into: to meet someone unexpectedly

Can you show an example of each?

Collide: The two cars collided at the intersection. Run into: I ran into an old classmate at the grocery store.

Can I use Collide and Run into interchangeably?

Not always. Collide and Run into are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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