Main Difference – Madam vs Madame
Both Madam and Madame are polite terms for addressing women. Though the difference between Madam and Madame seems to be created only by a single letter, this difference has lead to many other differences in these two words. Madam is pronounced as /ˈmadəm/whereas Madame is pronounced as/məˈdɑːm/. The main difference between Madam and Madame, however, lies in their meaning and usage. Madam is a polite form of address for women whereas Madame is a title or form of address used of or to a married French-speaking woman.
Madam – Meaning and Usage
Madam is a polite form of address for women. In spoken language, madam is often contracted to Ma’am. It is used to address a woman in a polite or respectful manner. When a lady’s name is not known, we usually use this term directly. For example,
How may I help you, madam?
May I take your coat, madam?
Madam does not reflect the marital status of a woman, although the term madam is mainly used to address older women. Madam is not used before a name or surname.
Madam can be also used to address a woman at the beginning of a formal letter. (‘Dear Madam, …’) When we are not sure of the gender of the recipient, we write Dear Sir/ Madam.
Madam is also used before a title to address or refer to a female holder of that particular position. Expressions like Madam President, Madam justice, and madam speaker are examples of this.
It is important to know that the word madam has another meaning. Madam also refers to a woman who leads a brothel.
What would you like to have, madam?
Madame – Meaning and Usage
Madame is a word of French origins which can be literally translated as my lady. In usage, Madame is a title or a form of address used to a French-speaking woman. English term madam is actually derived from French Madame. Unlike madam, Madame denotes the marital status of a woman; Madame is a title that is used for married women. It is the French equivalent of ‘Mrs.’ the French equivalent of ‘Miss’ Mademoiselle.
However, you can also use Madame to address an old lady of French descent, regardless of her marital status. Madame can be either used before the surname or directly without the name.
It’s a pleasure to meet you, Madame LeBlanc
‘Please be carefully Madame,’ he said.
Madame Moitessier
Difference Between Madam and Madame
Definition
Madam is a polite form of address for women.
Madame is a title or form of address used of or to a married French-speaking woman.
Marital Status
Madam does not indicate marital status of the woman.
Madame denotes the marital status of the woman.
Origins
Madam is derived from the French Madame.
Madame is a French word.
Before Names
Madam is not generally used before a name.
Madame can be used before a title.
Before Titles
Madam can be used before a title.
Madame cannot be used before a title. 
Image Courtesy:
“Jean Auguste Dominique Ingres – Madame Moitessier – WGA11853” di Jean-Auguste-Dominique Ingres – Web Gallery of Art: Image Info about artwork. (Pubblico dominio) tramite Wikimedia Commons
