The phrase "principal meal" refers to the main meal of the day, typically eaten in the evening. Synonyms for this phrase include dinner, supper, main course, main dish, and entree. In some cultures, this meal may also be referred to as the evening meal or the last meal of the day. In addition to these formal terms, there are also many informal or slang terms for this meal, such as chow, grub, eats, and vittles. Whether it's referred to as dinner, supper, or simply chow, the principal meal is an important part of many people's daily routines and often serves as a time for gathering and socializing with family and friends.