Christmas definition: 1. Christmas definition is - a Christian feast on December 25 or among some Eastern Orthodox Christians on January 7 that commemorates the birth of Christ and. Need to translate " 激しく" ( Hageshiku) from Japanese? ( the period just before and after) 25 December, a Christian holy day that celebrates the birth.Hageshiku meaning of christmas. What will you say in Japanese about Christmas? To get Kentucky Fried Chicken for Christmas dinner— and eat only the skin. Need to translate " 激しく" ( Hageshiku) from Japanese? Christmas definition: Christmas is a Christian festival when the birth of Jesus Christ is celebrated. Christmas definition, the annual festival of the Christian church commemorating the birth of Jesus: celebrated on December 25 and now generally observed as a. | Meaning, pronunciation, translations and examples. This doesn' t change the pronunciation or emphasis, it only means the vowel is.