1.
If someone is ~, they are alone.
It is estimated that every year 50 ~ children arrive in Britain...
Kelly’s too young to go ~.
ADJ: ADJ n, ADJ after v, v-link ADJ
2.
Unaccompanied luggage or goods are being sent or transported separately from their owner.
Unaccompanied bags are either searched or removed.
ADJ: ADJ n
3.
An ~ voice or instrument sings or plays alone, with no other instruments playing at the same time.
...an ~ flute...
The piece is most often sung ~.
ADJ: ADJ n, ADJ after v