unaccompanied

Going or acting without companions or a companion.

Performed or scored without accompaniment.

Not attended; having no attendants, companions, or followers; not followed, as with a consequence.

In music, without instrumental accompaniment or support: used especially of vocal music: as, an unaccompanied solo or quartet.

travelling without companions

performed or scored without accompaniment; solo

being without an escort

without anybody else or anything else

playing or singing without accompaniment

(of a state or an event) taking place without something specified occurring at the same time