Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “run sth in”

run sth in

UK (US break sth in)
verb uk phrasal verb with run   /rʌn/ (present participle running, past tense ran, past participle run) us  
If you run in a vehicle, you use it carefully and slowly for a short time when it is new, so that you do not damage its engine.
(Definition of run sth in from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of run sth in?
Browse related topics

You are looking at an entry to do with Using and misusing, but you might be interested in these topics from the Using and not using topic area:

Add Cambridge dictionaries to your browser to your website

Translations of “run sth in”

Word of the Day

dawn on sb

If a fact dawns on you, you understand it after a period of not understanding it.

Word of the Day

The language of work

by Kate Woodford,
October 15, 2014
Most of us talk about our jobs. We tell our family and friends interesting or funny things that have happened in the workplace (=room where we do our job), we describe – and sometimes complain about – our bosses and colleagues and when we meet someone for the first time, we tell

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More