The term "click" is commonly understood as military slang for a kilometer, often spelled "klick." This usage is prevalent not only in military contexts but also in Canada, where it is a standard term. The discussion highlights that "klick" can refer to distances on military maps, specifically one grid square on a 1:50,000 or 1:100,000 scale. Participants noted that the term has been popularized through military films and personal experiences, with some humorously referencing its origins in the Vietnam War. Additionally, there were mentions of other meanings of "click," such as in mechanical contexts, but the primary focus remained on its definition as a unit of distance. The conversation reflects a mix of curiosity and light-hearted banter about the term's usage and spelling.