From the theoretical vantage point, this book explicates the major concepts in vocabulary learning and acquisition. From the practical perspective, it provides the prospective readers with in-depth understanding of how these pedagogical interventions can be implemented in the classroom settings. Teachers and students of second or foreign languages agree that vocabulary acquisition is a major goal of language learning and research into vocabulary learning for EFL students has been prominent. The present book also illuminates the effects of instruction in deriving word meaning on incidental vocabulary learning in EFL contexts. It is postulated that inferring word meaning in context creates opportunities for incidental learning, enables vocabulary acquisition and reading at the same time, and is more individualized and student-based because the vocabulary being acquired is dependent on the student's own selection of reading materials.