The noun "iron" can be both countable and uncountable.
Meaning: a strong, hard metal
Example sentence: Pots and pans used to be made of iron, but now they're made of stainless steel.
Meaning: a household appliance for smoothing out wrinkles in clothes
Example sentence: Let the iron get hot before you starting ironing the clothes.
Note: In chemistry, "iron" is one of the chemical elements (symb. Fe) and one of the trace elements needed by our bodies. This meaning is uncountable.
Test your understanding:
- Were you taught how to use an iron when you were young?
- Were you taught about the uses of iron when you were young?