(n.) A festival of the heathen Celts on the first day of May, in the observance of which great bonfires were kindled. It still exists in a modified form in some parts of Scotland and Ireland.
Example Sentences:
(1) Some druidical Beltane fire flickered in Thurley's eyes and he snapped back at me, quick as a flint-tipped arrowhead fired from a Neolithic bow: "Museumification isn't a word!"