a piece of music that is played or sung by one person
done by a single person;without a companion or partner
alone ;by oneself
"a passage for solo clarinet"
"the child stayed home alone"
"the pillar stood alone, supporting nothing"
"he flew solo"
Contributing to an outstanding trombone section, and taking some solos.
出自：Jazz Journal International
There came..a loud peal of laughtersnot a solo, but a duet.