Bel"tane (?), n. [Gael. bealltainn, bealltuinn.]
The first day of May (Old Style).
The quarter-days anciently in Scotland were Hallowmas, Candlemas, Beltane, and Lammas.
New English Dict.
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.
© Webster 1913.