noun
divorce suit; divorce proceedings
Legal term for a court case or legal process to obtain a divorce.
彼女は夫に対して離婚訴訟を起こした。
She filed a divorce suit against her husband.
離婚 is the general term for divorce, while 離婚訴訟 specifically refers to the legal proceedings or lawsuit.
Compound of 離婚 (divorce) and 訴訟 (lawsuit, litigation).