OBA ‘both’, a unique Russian word

The paper offers a lexicographic description of the three lexemes that constitute the vocable OBA ‘both’, which is unique in Russian; a linguistic justification of this description is proposed, in particular, a discussion of the vocable’s constituency (сan a vocable include lexemes of different parts of speech?). In connection with the lexicographic definitions of oba lexemes, the semantemes ‘vse1’ = ‘all [people]’ and ‘dva2’ = ‘two [books]’ are examined. The lexeme oba1 (obe tablicy ‘both tables’) is a defective quantitative numeral; the lexemes OBA2a/2b (Oba/Obe uže uexali ‘Both.men/Both.women have already left’) are pronominal nouns. Special syntactic constructions and morphological particularities of the three OBA lexemes are described.