Definitions for "Shavuot"
(weeks) the annual festival of the firstfruits celebrated at the conclusion of the seven weeks of counting the omer (Leviticus 23:15-21; Deuteronomy 16:9-12); also known as Pentecost from the Greek pentekoste ( fiftieth day).
A pilgrim festival, where in ancient times, the Jewish people used to make a pilgrimage to the Temple in Jerusalem. Shavuot is the birthday of the Jewish religion. According to Judaism, the Torah was given to Jews on Sinai. During Shavuot, it is a Jewish custom to stay up all night and study the Torah as well as eat dairy products.
"weeks". The Festival of Weeks named in Ex. 34:22 and Deut. 16:16, celebrated seven weeks and a day (i.e., fifty days) after Pesach. Christian texts use "Pentecost" (fifty) for this festival. Rabbinnic tradition observes Shavuot as the time of the Giving of the Torah at Sinai.