Meaning

noun a furnace for firing or burning or drying such things as porcelain or bricks

originFrom Middle English kilne, from Old English cyln, cylen, cylin (“large oven, kiln”), from Latin culīna (“kitchen, kitchen stove”). Middle English -ln(e) usually becomes modern -ll as in mill. The pronunciation /kɪln/ may be based on dialects in which this simplification did not take place, but it must have been at least reinforced by spelling pronunciation.

Etymology from Wiktionary, CC BY-SA 3.0