Oxford Advanced American Dictionary

Definition of iron noun from the Oxford Advanced Learner's Dictionary

Oxford3000

iron

noun
iron pronunciation English ˈaɪən iron pronunciation American ˈaɪərn
 
 

metal

1 [uncountable] (symb. Fe) a chemical element. Iron is a hard strong metal that is used to make steel and is also found in small quantities in blood and foodcast/wrought/corrugated ironiron gates/bars/railingsan iron and steel worksiron ore (= rock containing iron)patients with iron deficiency (= not enough iron in their blood)iron tablets (= containing iron prepared as a medicine) (figurative) She had a will of iron (= it was very strong).
 

tool

2 [countable] a tool with a flat metal base that can be heated and used to make clothes smootha steam iron3 [countable] (usually in compounds) a tool made of iron or another metal see also branding iron, soldering iron, tire iron
 

for prisoners

4 irons [plural] chains or other heavy objects made of iron, attached to the arms and legs of prisoners, especially in the pastleg irons (old-fashioned) to clap somebody in irons
 

in golf

5 [countable] one of the set of clubs (= sticks for hitting the ball with) that have a metal headHe hit a magnificent shot with a nine iron. compare wood
Idioms

have several, etc. irons in the fire

to be involved in several activities or areas of business at the same time, hoping that at least one will be successful
more at pump iron at pump verb, rule with a rod of iron at rule verb, strike while the iron is hot at strike verb