プログレッシブ和英中辞典(第4版)の解説
ばんこん【晩婚】
あの夫婦は晩婚だ
The couple (got) married late in life.
晩婚化
a tendency to marry late [later]; a rise in the average age of marriage
晩婚化が進んでいる
People are marrying later than they used to./The average age of (first) marriages is on the rise.