Formal:
* Senhora: This is the most common and general term for "madam." It is used in formal settings, such as when addressing a woman you don't know well or when showing respect.
* Dona: This is a more affectionate and respectful term, often used when referring to a woman you know well, particularly an older woman.
Informal:
* Madame: This is a direct translation of "madam" and is sometimes used, but it sounds somewhat archaic and formal in Portuguese.
* Senhorita: This means "miss" and is used to address a young unmarried woman.
Example:
* "Good morning, Senhora." (Good morning, Madam.)
* "Can I help you, Dona?" (Can I help you, Madam?)
The best translation will depend on the specific situation and the level of formality you want to convey.