Complete vs Run-out

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

Complete

Top 1,000 (very common)A1adjective

Run-out

Top 2,000 (common)
Most common: Complete
 CompleteRun-out
Pronunciation🇬🇧 /["/kəmˈpliːt/"]/🇺🇸 /["/kəmˈpliːt/"]/🇬🇧 //rʌn aʊt//🇺🇸 //rʌn aʊt//
MeaningTo finish something completely.When something is used up completely.
ExampleThe puzzle is now complete after I found the last piece.I ran out of milk, so I can't make coffee.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelA1-
Part of speechadjective
Collocationsbe, seem, survive, remarkably, very, far from, be, seem, almost, nearly, substantiallyrun out of gas, run out of time, run out of options, run out of stock, run out of patience
Antonymsincomplete, unfinished, partial-
Common mistakesConfused with 'finished' — both mean to end, but 'complete' emphasizes fullness., Using 'complete' when a task is partially done., 'Complete' is sometimes incorrectly used as a noun.Saying 'ran out of' when it should be 'run out of'., Using 'run out' without mentioning what is being run out., Confusing 'run out' with 'run away'.
Usage notesUse 'complete' in academic or professional contexts when discussing tasks, projects, or forms. Avoid using it in overly casual conversations.Use 'run out' when something is finished, like food or resources. It's appropriate in both formal and informal contexts.

Frequently asked questions: Complete vs Run-out

What's the difference between Complete and Run-out?

Complete: To finish something completely. Run-out: When something is used up completely.

Which is more common: Complete and Run-out?

Complete is the most common in everyday English.

Can I use Complete and Run-out interchangeably?

Not always. Complete and Run-out 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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