noun
Wasei-eigo from English 'top lady', used to refer to the wife of a head of state, especially in a Japanese context. Not a direct translation of 'first lady' but carries the same meaning.
wasei-eigo (Japanese-coined English), from top lady
新しい大統領のトップレディーは、国際的な慈善活動で知られている。
The new president's first lady is known for her international charity work.
トップレディーとして、彼女は多くの公式行事に出席した。
As first lady, she attended many official functions.