Passover is a Jewish and Samaritan celebration of the Hebrews' escape from bondage in Egypt. In the book of Exodus, in The Bible, God sent ten plagues among Pharoah and the Egyptians to get Pharaoah to free the Hebrews. On the tenth plague, God warned the killing of the first born child of every home, with the exception of the Hebrews' home with the blood of a lamb spread on their doorpost. That night, God sent his holy spirit, and the homes with the blood of the lamb on the doorposts were passed over, creating the term passover. As a result, Pharoah freed the Hebrews.
It depends on the brand. However, even brands of real mustard that are certified kosher for Passover are still kitniyot.
Our Blessed Lord used the occasion of the Passover to institute the Lord's Supper: the most Holy Eucharist, commonly known as the Mass. The meaning that He gave to it came the following day, on Good Friday, when He offered His life on the cross for the redemption and salvation of all of us. Thus the meaning that He gave it was the sacrifice of Himself upon the cross. This meaning was always there as the old Passover meal re-presented the Passover in Egypt when God saved His people which was to foreshadow the great Passover when God saved His people through the wood of the cross.
To the best of my knowledge equal is not real sugar. If that is the case, it needs specific certification for passover, which it probably doesn't have.
Real teriyaki sauce, which contains soy sauce, would be kitniyot. There are imitation teriyaki sauces available for Passover.
No processed food is kosher for Passover unless its label has a symbol of reliable Rabbinic supervision.
There is no such thing as a "reformed" Jew. It is called "reform Jew". Reform Jews celebrate passover as a commoration of the exodus of the ancestors of the Jews from Egypt and into freedom, which is the same meaning passover has to Conservative and Orthodox Jews.
If you are asking what the Hebrew word for "Passover" is, it's pesakh (פסח). If you are asking for the meaning of the holiday, it is a celebration of freedom, commemorating the exodus from Egypt.
It was about the meal in which the lamb would be sacrificed.
Although some Christians can choose to reference Passover, they do not celebrate the actual Jewish holiday of Passover. The main reason being that the beliefs of Christianity are diametrically opposed to the meaning behind Passover. Christians celebrate the holiday of Easter which occurs at the same time of year as Passover (although the two holidays are completely unrelated).
Real granola, which contains oats and wheat, is chametz and cannot be eaten during Passover.
The Last Supper of Jesus was a Jewish Passover meal, or Seder.
It is not a real word with a real meaning.