The phrase "when in Rome" has been so widely used as to have been regularly shortened from the full phrase which is "when in Rome, do as the Romans do." This phrase means to adapt to one's surroundings or environment so as to fit in and not cause upset. Through common usage it has also come to mean simply to follow general customs for where you are as a matter of course.

This proverb is very old and dates to 390AD when Saint Augustine wrote a letter in which he says: "When I go to Rome, I fast on Saturday, here (in Milan) I do not. Do you also follow the custom of whatever church you attend, if you do not want to give or receive scandal."

Use Example - "I have to say this custom of taking a siesta in the afternoon is pretty nice." Claude said. "I was never one for napping but since everyone here does, I decided to try. After all, when in Rome!"

Source Tags : Writings     Concept Tags : Adaptation