1

iron

noun \ ˈī(-ə)rn \
Updated on: 12 Dec 2017

Definition of iron

1 : a silver-white malleable ductile magnetic heavy metallic element that readily rusts in moist air, occurs native in meteorites and combined in most igneous rocks, is the most used of metals, and is vital to biological processes — see Chemical Elements Table
2 : something made of iron: such as
a irons plural : shackles for the hands or legs
b : a heated metal implement used for branding or cauterizing
c : a household device usually with a flat metal base that is heated to smooth, finish, or press (such as cloth)
d : stirrup usually used in plural
e : any of a series of numbered golf clubs having relatively thin metal heads — compare wood
3 : great strength, hardness, or determination
iron in the fire
1 : a matter requiring close attention
2 : a prospective course of action

Recent Examples of iron from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'iron.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of iron

Middle English, from Old English īsern, īren; akin to Old High German īsarn iron

Other Metals and Metallurgy Terms


2

iron

adjective

Definition of iron

1 : of, relating to, or made of iron
2 : resembling iron
3 a : strong and healthy : robust
  • an iron constitution
b : inflexible, unrelenting
  • iron determination
c : holding or binding fast
  • an iron grip

ironness

play \ˈī(-ə)rn-nəs\ noun

Examples of iron in a Sentence

  1. he had an iron determination to succeed in on Wall Street

First Known Use of iron

before 12th century


3

iron

verb

Definition of iron

transitive verb
1 : to furnish or cover with iron
2 : to shackle with irons
3 a : to smooth with or as if with a heated iron
  • iron a shirt
b : to remove (something, such as wrinkles) by ironing
intransitive verb
: to smooth or press cloth or clothing with a heated iron

Recent Examples of iron from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'iron.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of iron

15th century



IRON Defined for English Language Learners

iron

noun

Definition of iron for English Language Learners

  • : a heavy type of metal that is very common, occurs naturally in blood, and is used to make steel and in many products

  • : a device with a flat metal base that is heated and is used to press wrinkles out of clothing

  • : a golf club that has a metal head and is identified by a number


iron

adjective

Definition of iron for English Language Learners

  • : made of iron

  • : very strong


iron

verb

Definition of iron for English Language Learners

  • : to use a heated iron to make clothing or fabric smooth


IRON Defined for Kids

1

iron

noun \ ˈī-ərn \

Definition of iron for Students

1 : a heavy silvery white metallic chemical element that rusts easily, is strongly attracted by magnets, occurs in meteorites and combined in minerals, and is necessary for transporting oxygen in the blood
2 : a device that is heated and used for making cloth smooth
3 : a device that is heated to perform a task
  • a soldering iron
4 irons plural : handcuffs or chains used to bind or to hinder movement

2

iron

adjective

Definition of iron for Students

1 : made of iron
2 : strong and healthy
  • He has an iron constitution.
3 : not giving in
  • an iron will

3

iron

verb

Definition of iron for Students

ironed; ironing
: to press with a heated iron

Medical Dictionary

iron

noun \ ˈī(-ə)rn \

medical Definition of iron

1 : a heavy malleable ductile magnetic silver-white metallic element that readily rusts in moist air, occurs native in meteorites and combined in most igneous rocks, is the most used of metals, and is vital to biological processes (as in transport of oxygen in the body) symbol Fe — see Chemical Elements Table
2 : iron chemically combined
  • iron in the blood

iron

adjective


Seen and Heard

What made you want to look up iron? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to make fruitful or productive

Get Word of the Day daily email!

Test Your Vocabulary

Star Wars Words Quiz

  • cu-jedi-training
  • The bounty portion of bounty hunters (such as Boba Fett) comes from a Latin word meaning
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!