unaccompanied in WordNet English dictionary

1. without anybody else or anything else
   "the child stayed home alone"; "the pillar stood alone, supporting nothing"; "he flew solo"
   alone  solo  unaccompanied  alone  solo  unaccompanied 
   

1. being without an escort
   unaccompanied 
   
2. playing or singing without accompaniment
   "the soloist sang unaccompanied"
   unaccompanied 
   
3. (of a state or an event) taking place without something specified occurring at the same time
   "a headache unaccompanied by other symptoms"
   unaccompanied 
   

unaccompanied in English Wiktionary