a furnace for firing or burning or drying such things as porcelain or bricks
"The ancient kiln still stood intact in the corner of the pottery workshop, its brick walls blackened from years of firing clay."
An oven or furnace or a heated chamber, for the purpose of hardening, burning, calcining or drying anything; for example, firing ceramics, curing or preserving tobacco, or drying grain.
"The potter carefully loaded the fragile clay bowls into the kiln before turning on the heat to fire them."
To bake in a kiln.
"The artisan carefully loaded the fragile pottery into the kiln to fire it at high temperatures."