Second Lady (for females) or Second Gentleman (for males) is a title sometimes used in reference to the spouse of a vice president or a lieutenant governor, and if no office of vice president or lieutenant governor exists, of a prime minister or premier/chief minister of a republic, and to the deputy prime minister or deputy premier/deputy chief minister of a monarchy, styled relative to the title of First Lady, the wife of a president or governor of a republic or of a prime minister or premier/chief minister of a monarchy.
In countries which have more than one Vice-Presidential position (e.g. Peru, Afghanistan), the Second Lady would be the spouse of the First Vice-President, the Third Lady would be the spouse of the Second Vice-President, etc.
Although no country grants any legal power to second ladies, their duties often include the following: