Ablution is Lennie Tristano's composition - a landmark piece in the cool-jazz repertoire and widely regarded as Tristano's masterpiece. The tune is associated with Tristano's improvisational approach and his cool-jazz circle, and it has circulated in jazz education through sources like the Real Book II. A notable piano solo arrangement exists by Francisco Merino Morales. Performances and discussions of Ablution appear in online videos such as Ablution: Lennie Tristano's Masterpiece with Matt Otto, Steve Lambert, and Sam Wisman. There are also connections noted between its chord changes and standards such as All The Things You Are and Out of Nowhere, and versions are documented as recorded or interpreted by Lee Konitz.
