Definition of "Solitary" :

noun: one who lives in solitude

noun: confinement of a prisoner in isolation from other prisoners

"He was held in solitary."

adjective: devoid of creatures

"A solitary retreat."

adjective: being the only one; single and isolated from others

"A solitary instance of cowardice."

adjective: characterized by or preferring solitude

"A man of a solitary disposition."

adjective: lacking companions or companionship

"A solitary traveler."

adjective: of plants and animals; not growing or living in groups or colonies

"Solitary bees."