The adj lone has 3 senses (first 2 from tagged texts)
1. (1) alone, lone, lonely, solitary -- (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")
2. (1) lone, lonely, solitary -- (characterized by or preferring solitude; "a lone wolf"; "a lonely existence"; "a man of a solitary disposition"; " a solitary walk")
3. lone, lonesome, only, sole, solitary -- (being the only one; single and isolated from others; "the lone doctor in the entire county"; "a lonesome pine"; "an only child"; "the sole heir"; "the sole example"; "a solitary instance of cowardice"; "a solitary speck in the sky")