'Lettish' definitions:

Definition of 'Lettish'

(from WordNet)
noun
The official language of Latvia; belongs to the Baltic branch of Indo-European [syn: Latvian, Lettish]

Definition of 'Lettish'

From: GCIDE
  • Lettish \Let"tish\ (l[e^]t"t[i^]sh), a. Of or pertaining to the Letts. -- n. The language spoken by the Letts. See Lettic. [1913 Webster]