noun.
The fact or state of being solitary, or alone, or without mate, partner, or companion, or of dwelling apart from others or by one's self; habitual retirement; solitude.
noun.
The state or character of being retired or unfrequented; solitude; seclusion: as, the solitariness of a wood.
the GNU version of the Collaborative International Dictionary of English
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the state of being alone in solitary isolation
noun.
a disposition toward being alone
Word Usage
"I may not deny but that there is some profitable meditation, contemplation, and kind of solitariness to be embraced, which the fathers so highly commended, [1562] Hierom, Chrysostom, Cyprian,"