Over the last 20 years, empirical puzzles involving plurals have motivated changes to our understanding of semantic composition in natural language. In this talk, I address these topics with new data from two sign languages — LSF and ASL — focusing on the use of space and iconicity. In the verbal domain, I show that pluractional verb meanings display 'scopable iconicity,' in which an iconic meaning can be evaluated at different structural positions. In the nominal domain, I show that dependent indefinites and the adjectives same and different show spatial agreement with a plural licensor. Both of these findings inform existing theoretical debates about the semantics of plurality and dependency.