solo       
 adjective [ before noun ], adverb uk/ˈsəʊ.ləʊ/ us/ˈsoʊ.loʊ/
B2 独自的(地),单独的(地),单人的(地)
alone; without other people
  a solo performance/flight 单人表演/飞行 
 to sail/fly solo 独自航行/飞行 
 He used to play with a group but now he's going solo/pursuing a solo career. 他以前加盟过一个乐队,但如今已单独发展。 
 - More examples
 - He made his name in the 90s boy band Boyzone, before going on to a highly successful solo career.
 - It's a retrospective album of solo Freddie Mercury tracks.
 - This is her first solo album.
 - This makes him the biggest-selling solo artist of all time.
 - This was his first solo appearance at a public event.
 
solo       
noun [ C ] uk/ˈsəʊ.ləʊ/ us/ˈsoʊ.loʊ/  solos
B2 独奏;独唱
a musical performance given by one person alone, or a musical performance in which one person is given special attention
  a trumpet solo 小号独奏 
 Parker's solo on "A Night in Tunisia" was so amazing that the pianist backing him simply stopped playing. 帕克的独奏《突尼斯之夜》实在是太精彩了,以至于为他伴奏的钢琴手干脆停了下来。 
 - More examples
 - A haunting oboe solo introduces the third movement of the concerto.
 - Each verse was sung as a solo and then everyone joined in on the chorus.
 - We had to sit through a ten-minute drum solo.
 - Next up was a tedious guitar solo.
 - She had to do a solo in the Christmas concert.