Solitude

A context in which individuals have no immediate possibility of social interactions or exchanges of information and affect these entail. At the same time, solitude is a situation in which individuals are free from social constraints, demands, and expectations, allowing them to think and act without the pressure of social scrutiny.

Reference:
Matias, G. P., Nicolson, N. A., & Freire, T. (2011). Solitude and cortisol: Associations with state and trait affect in daily life. Biological Psychology, 86(3), 314-319. doi: 10.1016/j.biopsycho.2010.12.011.