This study developed questionnaire items that can identify elementary learners’ vocabulary comprehension based on CEFR basic user level. This study also analyzed the use of textbooks’ vocabulary definitions based on CEFR basic user level. Vocabulary comprehension analysis was conducted on 141 students in 3rd through 6th grades for 33 vocabularies. As a result, Korean elementary learners’ vocabulary comprehension corresponded to CEFR basic user. Usually, A1 was higher than A2 in each vocabulary’s meaning comprehension. CEFR EVP(English Vocabulary Profile) classifies a single vocabulary’s various meanings to different levels. According to this study, 33 vocabularies have 2-4 meanings in CEFR basic user. In contrast, the Korean textbook wasn’t more varied in meaning usage compared to CEFR basic user’s. Specifically, A1 meanings were used more often than A2’s in textbooks. Since this study analyzed textbooks actually used by learners, there could be a relationship between learners’ vocabulary comprehension and textbook vocabulary meaning use. This study suggested a method of developing items according to CEFR level based on textbooks and curriculum vocabularies. The spectrum of vocabularies in the curriculum can be expanded with studies of learners based on CEFR level. Also, it is necessary to expand the vocabulary definitions in textbooks according to learners’ vocabulary comprehension.