D defs.my
Entry 1 sense Webster, 1913

Letts

/(lĕts)/ · IPA /lˈɛts/
01 n. pl. An Indo-European people, allied to the Lithuanians and Old Prussians, and inhabiting a part of the Baltic provinces of Russia.
  1. 1.
    An Indo-European people, allied to the Lithuanians and Old Prussians, and inhabiting a part of the Baltic provinces of Russia.(Ethnol.)