Russian quantifiers are known for their complexity. This dissertation investigates expressions of indefinite quantity--specifically, accusative-assigning s 'about' of approximate measure.This preposition has undergone a somewhat unique diachronic change which now requires that its complement consist of only a single word. I chronicle the advent of the single-word restriction (LONE-WD), showing historical data with multi-word complements of s. Adjective-noun and numeral-noun complements were once attested; Russian now requires only one word after s. This study investigates various apparent exceptions to LONE-WD, which are violated only under very specific circumstances. These exceptions clarify the morphosyntax of-- paucal numerals ('two' through 'four' and the fractions pol 'half' and četvert´ 'quarter'),-- 'prequantifier' adjectives,-- syntactic compounds (adjective-noun sequences which inflect separately but are treated by the syntax as a single word), and-- large-quantity numbers (tysjača 'thousand' and greater). Distributions of special genitive-singular and -plural forms, assigned only by quantifiers, are shown to be distinct: Only paucal numerals in morphological nominative case assign 'ADPAUCAL' genitive-singular forms (such as end-stressed čaSA 'hours'); a number of elements, not just numerals, trigger 'COUNT' genitive plural forms (čelovek 'people'). Other constructions discussed include okolo 'approximately', approximative inversion, ètak 'about', and neskol´ko 'several':Quantification is not a syntactic category but a semantic feature for which okolo is unmarked; okolo is quantificational only if its sister is a quantifier. Otherwise okolo is merely proximative: 'near'. Tests confirm that quantificational okolo heads a prepositional phrase within the noun phrase. While most prepositional quantifiers have this structure, accusative-assigning s is the relativized head of a hybrid phrase due to featural deficiencies.Numeral-noun complements of s undergo approximative inversion--the noun moving to specifier position--to circumvent LONE-WD. Approximative inversion is likewise subject to a variant of LONE-WD, which requires a single PROSODIC word in the quantified constituent. When inversion is impossible a pleonastic count noun is inserted instead.An Optimality-theoretic model is proposed, formalizing LONE-WD and constraints requiring prosodic contiguity and exceptions to LONE-WD caused by words expressing more closely defined measure.Ph.D."Corrections added as of June 1999
