1 historicalthe German Emperor, the Emperor of Austria, or the head of the Holy Roman Empire:
[as title]Kaiser Wilhelm.
2 North American Englisha round, soft bread roll with a crisp crust, made by folding the corners of a square of dough into the centre, resulting in a pinwheel shape when baked.
– PHRASES
the Kaiser's Wardated the First World War.
– DERIVATIVES
kaisershipnoun
– ORIGIN Middle Englishcayser, from Old Norsekeisari, based on LatinCaesar (see Caesar1), and later reinforced by Middle Dutchkeiser. The modern English form (early 19th century) derives from GermanKaiser.