Meaning

noun a substance that promotes drying (e.g., calcium oxide absorbs water and is used to remove moisture)

noun an appliance that removes moisture

adjective free from liquid or moisture; lacking natural or normal moisture or depleted of water; or no longer wet

originFrom Middle English driere, dreyere (“one who dries”), equivalent to dry + -er (agent noun suffix).

Etymology from Wiktionary, CC BY-SA 3.0