adj. 2.  Happening, done, or made alone: a solitary evening; solitary pursuits such as reading and sewing. 3.  Remote from civilization; secluded: a solitary retreat. 4.  Zoology   Living alone or in pairs only: solitary wasps; solitary sparrows. 5.  Single and set apart from others: a solitary instance of cowardice. n. pl.   sol·i·tar·ies  1.  A person who lives alone; a recluse. 2.  Solitary confinement. [Middle English, from Old French solitaire, from Latin sōlitārius, from sōlitās, solitude, from sōlus, alone; see  s(w)e- in the Appendix of Indo-European roots.] sol′i·tari·ly (-târə-lē) adv. soli·tar′i·ness n.  | 
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