This volume will appeal to anyone interested in knowing more about the fundamental building blocks of language: words. It brings together the fields of linguistics, neuroscience, psycholinguistics, speech-language pathology, and language education to present multifaceted perspectives on the topic of vocabulary. The theoretical and empirical contributions included consider some of the key questions facing the field, such as What is the mental lexicon?; What constitutes a word?; What are new and novel approaches to measuring and researching vocabulary?; and, What is the best way to teach vocabulary? This book will be useful to graduate students and scholars in the fields of theoretical linguistics, psycholinguistics, applied linguistics, adult and child language acquisition, and modern languages. In addition, it will appeal to language educators at various institutions, immigrant service specialists, school board officials, and study abroad consultants.