S: (adj) exclusive, sole (not divided or shared with others) "they have exclusive use of the machine"; "sole rights of publication"
S: (adj) 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"