also: だいがんじょうじゅ
noun, noun or participle which takes 'suru'
fulfillment of a great wish; realization of a long-cherished ambition
A yojijukugo used when a deeply held desire or major goal is finally achieved. Often carries a solemn or celebratory tone.
長年の夢だった宇宙旅行が実現し、まさに大願成就の思いです。
My long-held dream of space travel has come true; it truly feels like the fulfillment of a great wish.
彼は大願成就を祈って神社に参拝した。
He visited the shrine to pray for the realization of his great ambition.