1iron 
/ˈajɚn/ noun
plural irons /ˈajɚn/ noun 1 [noncount] : a heavy type of metal that is very common, occurs naturally in blood, and is used to make steel and in many products
▪ The bars/chains are (made of) iron. ▪ She has an iron deficiency. [=she does not have enough iron in her blood] — sometimes used figuratively ▪ an athlete with legs/muscles of iron [=very strong legs/muscles] ▪ She has a will of iron. [=she has a very strong will] — see also cast iron, wrought iron 2 [count] : a device with a flat metal base that is heated and is used to press wrinkles out of clothing
▪ a heated iron — see also curling iron, soldering iron, waffle iron 3 [count] : a golf club that has a metal head and is identified by a number
▪ a five-iron — compare wood 4 irons [plural] : chains placed on a prisoner's arms or legs
▪ They clapped/put the prisoner in irons. ▪ They slapped leg irons on him.
▪ The bars/chains are (made of) iron. ▪ She has an iron deficiency. [=she does not have enough iron in her blood] — sometimes used figuratively ▪ an athlete with legs/muscles of iron [=very strong legs/muscles] ▪ She has a will of iron. [=she has a very strong will] — see also cast iron, wrought iron
▪ a heated iron — see also curling iron, soldering iron, waffle iron
▪ a five-iron — compare wood
▪ They clapped/put the prisoner in irons. ▪ They slapped leg irons on him.
irons in the fire
: activities or projects that someone is involved in
▪ Although he won't say exactly what he's working on now, he says he has quite a few irons in the fire.
▪ Although he won't say exactly what he's working on now, he says he has quite a few irons in the fire.
pump iron — see 2pump
strike while the iron is hot — see 1strike
