Researchers define vocabulary learning strategies just according to the definition of learning strategies. According to Nation (2001), “vocabulary learning strategies are a part of language learning strategies which in turn are a part of general learning strategies”. Based on O’Malley and Chamot’s (1990) definition of learning strategies, Schmitt (1997) claimed that learning is “the process by which information is obtained, stored, retrieved and used. Therefore, vocabulary learning strategies could be any which affect this broadly defined process” (p. 203). Nation (2001) stated that “a strategy must involve choice be complex require knowledge and benefit from training, and increase the efficiency of vocabulary learning and vocabulary use” (p. 217).
Learning strategies are defined as “specific actions, behaviors, steps, or techniques -- such as seeking out conversation partners, or giving oneself encouragement to tackle a difficult language task -- used by students to enhance their own learning” (Scarcella & Oxford, 1992, p. 63). Nagy, Herman and Anderson (1985) stated that students can learn vocabulary through repeated exposure to those vocabulary items in various contexts, as is the case in native language acquisition.