Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “harden”

harden

verb [I or T] (SOLID)    /ˈhɑː.dən/ US  /ˈhɑːr-/
to become or make hard: The mixture hardens as it cools. It is thought that high cholesterol levels in the blood can harden the arteries (= make them thicker and stiffer, causing disease).Hard and firm hardening     /-ɪŋ/ noun [U or S] There has been a hardening of government policy since the invasion.Hard and firm
(Definition of harden verb (SOLID) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of harden

Browse related topics

You are looking at an entry to do with Hard and firm, but you might be interested in these topics from the Weight and firmness topic area:

Definitions of “harden” in other dictionaries

Word of the Day

generous

willing to give money, help, kindness, etc., especially more than is usual or expected

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