noun.
An iron for pressing clothes, especially one that is heated externally, as on a hearth or stove.
The Century Dictionary and Cyclopedia
noun.
An iron for smoothing cloth. It is made very hot and then passed quickly and firmly over the dampened surface of the fabric to be smoothed. Also sad-iron, or simply iron.
the GNU version of the Collaborative International Dictionary of English
noun.
An iron with a flat, smooth surface for ironing clothes.