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
unaccompanied
without accompaniment or companions; "the soloist sang unaccompanied"; "it had dramatic energy unaccompanied by an adequate sense of dramatic form"; "unaccompanied women were excluded"
1
disjunct
marked by separation of or from usually contiguous elements; "little isolated worlds, as abruptly disjunct and unexpected as a palm-shaded well in the Sahara"- Scientific Monthly