Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “lock”

lock

noun [C] (DEFINITE EVENT)    /lɒk/ US  /lɑːk/ US informal
something that is certain to happen : She's a lock for promotion this year .CertaintyConfidence and self-assurance
(Definition of lock noun (DEFINITE EVENT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of lock

Browse related topics

You are looking at an entry to do with Certainty, but you might be interested in these topics from the Chance and possibility topic area:

Definitions of “lock” in other dictionaries

Word of the Day

scramble

to mix eggs with a little milk and mix again as they are being fried

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More