Noun
iron (Fe)
鉄は最も有用な金属です。Iron is the most useful metal. steel
see 鋼
Noun which may take the genitive case particle 'no', Noun
iron (will, discipline, lady, etc.)
Noun, Noun, used as a suffix, Noun, used as a prefix
railway
Abbreviationsee 鉄道
Noun, used as a suffix
railway enthusiast
Colloquial
Also written 鐵【てつ】