Hee-Rahk Chae. 1999. A Definition and Classification of Locomotion Verbs. Studies in Modern Grammar 15, 79-100. In this paper, we will, firstly, examine morphological, syntactic and semantic issues related to the analysis of locomotion verb constructions. Secondly, after showing that locomotion verbs cannot be properly defined syntactically on the basis of the complements they take, we will provide a semantic definition of them and then a new classification of them. The classification will be based on a couple of parameters: whether the "Figure (moving entity)" is a subject or an object, and whether it is an Agent or not. In providing the definition and classification, we will make it clear that locomotion verbs are different from "motion verbs." In addition, we will factor out a group of "pseudo-locomotion verbs" from the group of locomotion verbs in the traditional sense. Lastly, we will clarify the relationship between locomotion verbs and the -le complement, which is assumed to uniquely characterize the Korean locomotion verbs in syntactic approaches. We will show that there are two groups of verbs which can take the complement (one is a subgroup of locomotion verbs and the other is a group of non-locomotion verbs), and that the complement shows different properties in each of the two groups.