We review literature and experimental data to distinguish solitude from other situations where people are alone but preoccupied by external activities or presence of other people. We further explore meaningful factors shaping solitary experiences, including the reasons for which we find ourselves alone, the activities that we engage in, and the characteristics of solitude that feel authentic and true to ourselves. Thus, this chapter aims to advance understanding of the nuances around our solitary experiences and emphasizes the importance of exploring the nuances of solitude instead of treating it as a unidimensional phenomenon.