Park Yeong-seop. 2002. A Study on the Korean Vocabulary in the Enlightenment Period. Korean Semantics, 11. This paper is aims at studing on the korean vocabulary in the enlightenment period. In this period, there were various kinds of vocabularies as it reflects the special status of the enlightenment era. In the middle of reform, there were the middle and modern ages vocabularies in the base of the vocabularies. They tried to maintain Chinese character vocabularies in one hand but on the other hand in the books written and published by the enlightened people, there were many newly coined vocabularies and borrowed words.Accordingly, this era can be considered as a transition period of mixed vocabularies of middle and modern ages vocabularies, Chinese character vocabularies and Japanese Chinese character vocabularies (Newly-coined ones). Afterwards, middle modern ages vocabularies were decayed in Korean language system and many more Japanese Chinese character vocabularies entered into Korean vocabulary system and used as a part of its vocabularies.