The purpose of this essay was to see whether our idea of time might be an illusion, and inorder to find out, I look both at what modern philosophy says about the concept of time aswell as what modern physics says. I want to see if there is consensus between the two fields inorder to find a unified definition of time; and using this definition I want to see whether timemight be an illusion. As it turns out, time is an elusive concept that is difficult to define, andeven though most, if not all, researchers in both philosophy and physics agree that time exists,there is little else they agree on when it comes to explaining what time in fact is. Inphilosophy, there is also disagreement within the field and the discussion centers on time asquality, while physics focus on time as quantity – used to measure the world around us. Giventhe different accounts of time, it seems that each of us are left to make up our own mindsabout how to define it. Whether or not time is an illusion depends on how time is defined.And until there is a clear definition of time it also becomes impossible to say for certainwhether time is an illusion.