(now historical) A small pennon; a little banner, flag, or streamer. / (obsolete) A lady's favour or token as worn by a knight. / (rare, obsolete) A knight carrying a pennon.

(organic chemistry) A ceveratrum alkaloid.

(rail transport) Any steam locomotive that has a tender attached, carrying its supply of fuel and water; the term is normally used to distinguish from a tank engine.

(slang) Used as an intensifier, particularly for crazy or synonyms.