1. [n]  a resident of Lancaster
2. [n]  a member (or supporter) of the house of Lancaster
3. [adj]  of or relating to the English city of Lancaster or its residents; "Lancastrian city center"
4. [adj]  of or relating to the former English royal house or their supporters; "Lancastrian royalty"

LANCASTRIAN is a 11 letter word that starts with L.