lone 
/ˈloʊn/ adjective
always used before a noun /ˈloʊn/ adjective 1 : standing, acting, or being alone
▪ a lone traveler [=a traveler who is alone] ▪ a lone gunman ▪ He was the lone [=only, sole] official to vote against the plan. ▪ a lone [=solitary] tree on the hill — see also lone wolf 2 Brit : not having a partner (such as a husband or wife)
▪ a lone [=single] parent/father/mother
▪ a lone traveler [=a traveler who is alone] ▪ a lone gunman ▪ He was the lone [=only, sole] official to vote against the plan. ▪ a lone [=solitary] tree on the hill — see also lone wolf
▪ a lone [=single] parent/father/mother
