solitude

1. The state or quality of being alone or remote from others.

2. A lonely or secluded place.

Synonyms: These nouns denote the state of being alone. Solitude implies the absence of all others: "The worst solitude is to be destitute of sincere friendship" (Francis Bacon). "I love tranquil solitude" (Percy Bysshe Shelley).
Isolation emphasizes total separation or detachment from others: "the isolation of Crusoe, depicted by Defoe's genius" (Winston Churchill).
Seclusion suggests removal, though not necessarily complete inaccessibility; the term often connotes a withdrawal from social contact: enjoyed my walk in the seclusion of the woods.
Retirement suggests a withdrawal or retreat from active life, as for serenity or privacy: "an elegant sufficiency, content,/Retirement, rural quiet, friendship, books" (James Thomson).