'Laurentian' definitions:
Definition of 'Laurentian'
From: GCIDE
- Laurentian \Lau*ren"tian\, a. Pertaining to, or near, the St. Lawrence River; as, the Laurentian hills. [1913 Webster]
- Laurentian period (Geol.), the lower of the two divisions of the Arch[ae]an age; -- called also the Laurentian. [1913 Webster]