This document discusses semantic transfer in adult second language (L2) vocabulary acquisition. It proposes that adults already have an established first language (L1) conceptual and lexical system, so L2 vocabulary acquisition does not involve much additional conceptual or semantic development. Instead, adults initially rely on L1 translations when using new L2 words, and only gradually develop more independent L2 meanings and usage. The document also notes that more research is needed on form-meaning mappings in adult L2 acquisition.