Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “proof”

proof

adjective [after noun] (PROTECTED)    /pruːf/ formal
providing protection against something: No household security devices are proof against (= protect completely against) the determined burglar. Her virtue would be proof against his charms.Defending and protectingBacking, supporting and defendingPreserving and saving
(Definition of proof adjective (PROTECTED) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of proof

Word of the Day

navigate

to direct the way that a ship, aircraft, etc. will travel, or to find a direction across, along, or over an area of water or land, often by using a map

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