Spouse of the president of Singapore

The spouse of the president of Singapore, sometimes referred to as the first lady or first gentleman, is a title typically held by the wife or husband of the president of Singapore, concurrent with the president's term in office. A courtesy term not enshrined in the Constitution, the spouse's role has never been codified or officially defined, but nevertheless figures prominently in the political and social life of Singapore.

Source: Wikipedia — Spouse of the president of Singapore (CC BY-SA 4.0)