The understanding of knowledge can be impaired if it is isolated from the proper context. Despite the importance of contextual information, there has been limited support for utilizing context in current knowledge management and collaborative systems. This paper presents a knowledge context model, called KC-V, which facilitates the use of contextual information in virtual collaborative work. Four benefits of using KC-V are suggested: evolutionary accumulation of knowledge aligned with collaborative activities, supporting the virtual team lifecycle, improved understanding by rich navigation paths, and searching for knowledge with similar context. A web-based collaboration system called VWSS is developed using KC-V.