What does "easter" mean?

Easter: The day on which the festival is observed; Easter day. Note: Easter is used either adjectively or as the first element of a compound; as, Easter day or Easter-day, Easter Sunday, Easter week, Easter gifts. Sundays by thee more glorious break, An Easter day in every week. Keble. Note: Easter day, on which the rest of the movable feasts depend, is always the first Sunday after the fourteenth day of the calendar moon which (fourteenth day) falls on, or next after, the 21st of March, according to the rules laid down for the construction of the calendar; so that if the fourteenth day happen on a Sunday, Easter day is the Sunday after. Eng. Cyc. Easter dues (Ch. of Eng.), money due to the clergy at Easter, formerly paid in communication of the tithe for personal labor and subject to exaction. For Easter dues, Easter offerings, voluntary gifts, have been substituted. -- Easter egg. (a) A painted or colored egg used as a present at Easter. (b) An imitation of an egg, in sugar or some fine material, sometimes made to serve as a box for jewelry or the like, used as an Easter present.