1An electric iron used to press clothes — removing wrinkles and shaping fabric. Often used with かける, as in 'アイロンをかける' (to iron something).
出かける前にワイシャツにアイロンをかける。
I iron my dress shirt before going out.
アイロンの温度は素材に合わせて調節する。
I adjust the iron's temperature according to the fabric.
旅行用に小さくて軽いアイロンを買った。
I bought a small, lightweight iron for traveling.
2A hair iron — a device used to straighten or curl hair; also called a hair straightener, curling iron, or コテ.
出かける前にヘアアイロンで前髪を整えた。
I fixed my bangs with a hair iron before going out.
アイロンで髪をゆるく巻いてパーティーに出かけた。
I loosely curled my hair with a hair iron and went out to the party.