solitary

Short definition from Wiktionary

Noun

1. 1
   One who lives alone, or in solitude; an anchorite, hermit or recluse.
2. 2
   Ellipsis of solitary confinement.
3. 3
   The state of being solitary; solitude
4. 4
   Archaic form of solitaire (“Rodrigues solitaire”).

Adjective

1. 1
   Living or being by oneself; alone; having no companion present
2. 2
   Performed, passed, or endured alone.
3. 3
   Not much visited or frequented; remote from society
4. 4
   Not inhabited or occupied; without signs of inhabitants or occupation; desolate; deserted
5. 5
   Gloomy; dismal, because of not being inhabited.
6. 6
   Single; individual; sole.
7. 7
   Not associated with others of the same kind.