expression, ichidan verb
be late getting married; miss the chance to marry
Used especially for women who are considered past the typical marriageable age. Often carries a slightly old-fashioned or critical nuance.
彼女は仕事に夢中で、嫁に行き遅れてしまった。
She was so absorbed in her work that she ended up missing her chance to get married.
昔は25歳
In the past, it was said that if a woman was over 25, she was late getting married.