Tangential is an adjective that can be used to describe something that is slightly or indirectly related to something else, or something that is not closely connected to it. It can also refer to something that is touching lightly, or moving in the direction of a tangent. In geometry, a tangent is a line that touches a curve in one spot but doesnt intersect it anywhere else. Some examples of how tangential can be used in a sentence include:

• "Their romance is tangential to the books main plot"
• "The speakers comments were tangential to the topic at hand"
• "The article included some tangential information that wasnt really relevant to the main point"
• "The conversation took a tangential turn when someone brought up a related topic"

Overall, tangential is a word that can be used to describe something that is not directly related to a particular topic or subject.