adjectives
lacking companions or companionship
"he was alone when we met him"; "she is alone much of the time"; "the lone skier on the mountain"; "a lonely fisherman stood on a tuft of gravel"; "a lonely soul"; "a solitary traveler"
marked by dejection from being alone
"felt sad and lonely"; "the loneliest night of the week"; "lonesome when her husband is away"; "spent a lonesome hour in the bar"
characterized by or preferring solitude
"a lone wolf"; "a lonely existence"; "a man of a solitary disposition"; "a solitary walk"
devoid of creatures
"a lonely crossroads"; "a solitary retreat"; "a trail leading to an unfrequented lake"