Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “iron”

iron

noun [U] (METAL)    /aɪən/ US  /aɪrn/
B1 (symbol Fe) a chemical element that is a common greyish-coloured metal. It is strong, used in making steel, and exists in very small amounts in blood: Iron rusts easily. Liver is a particularly rich source of dietary iron. iron ore an iron deficiencyChemical elementsMetals and metalworkingChemical elements
(Definition of iron noun (METAL) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of iron

Definitions of “iron” in other dictionaries

Word of the Day

limber up

to do gentle exercises to stretch the muscles in order to prepare the body for more active physical exercise

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