Lassan (Hungarian for "slowly") or more properly lassú ("slow") is the slow section of the csárdás, a Hungarian folk dance, or of most of Liszt's Hungarian Rhapsodies, which take their form from this dance.
Lassan is a Hungarian term meaning "slow" and is used to describe the slower segment of the csárdás, a classic Hungarian folk dance. Similarly, it also refers to the slow parts within Liszt's Hungarian Rhapsodies, which are modeled after this traditional dance.