In English the word serves double duty (and does other stuff) - "Hey Mr., can you tell me which way it is to the subway station" is a perfectly natural sentence. They can even be anonymized nouns (similar to la blanca - referring to a white house depending on context) - "Oh, I was going to wait to open the bottle until the Mrs. gets back". Lastly you've got the example I had in my prior comment "Oh sorry, I actually wanted to speak with Mrs. Smith - can you put her on the line?" where it is functionally, I think, an adjective though the dictionary considers it a noun in that usage.