← BackshareGuessaeriform/ˈɛrɪfɔrm/adjectiveHaving the form or nature of air; gaseous or unsubstantial.Steam is an aeriform state of water.The magician created an aeriform illusion that seemed to float in the air.Some philosophers described the soul as aeriform and invisible.SynonymsairygaseousAntonymssolidliquid