- 1(of a line, pole, etc.) going straight up or down from a level surface or from top to bottom in a picture, etc. synonym perpendicular the vertical axis of the graph The cliff was almost vertical. There was a vertical drop to the ocean. compare horizontal
- 2having a structure in which there are top, middle, and bottom levels a vertical flow of communication
NAmE//ˈvərt̮ɪkli//
adverb The cliffs rose up vertically out of the water.See vertical in the Oxford Advanced Learner's DictionaryCheck pronunciation: vertical