Meaning of “iron” - Learner’s Dictionary

iron

noun uk us /aɪən/
METAL [ U ]

B1 a dark grey metal used to make steel (= very strong metal) and found in small amounts in blood and food (formula Fe):

an iron bar/gate
Most women need more iron in their diet.
ELECTRICAL EQUIPMENT [ C ]

B1 a piece of electrical equipment that you use for making clothes flat and smooth

→ See also cast iron , wrought iron

(Definition of “iron noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)