Definition:
- (a.) Of or pertaining to the Letts; Lettish.
- (a.) Of or pertaining to a branch of the Slavic family, subdivided into Lettish, Lithuanian, and Old Prussian.
- (n.) The language of the Letts; Lettish.
- (n.) The language of the Lettic race, including Lettish, Lithuanian, and Old Prussian.