A "solo album" refers to a musical album that is created and performed by a single artist, excluding any collaboration with a band or group. Full definition
I listened to her first solo album like crazy a few years ago, but somehow I just forgot about her... until now. (edgarwrighthere.com)
But following the release of his debut solo album The Fire earlier this year, he is gaining recognition and collecting 5 * reviews by the bucket - load. (premierchristianity.com)
He relies mostly on his older, more popular material to sing, not having written any new material since a critically and commercially unsuccessful solo album. (qwipster.net)