Definition of "Pascha"

Passover (biblical, Israelite, Jewish, or Christian Passover; this term also includes Quartodeciman Passover, observed on Nisan 14, especially by Christians in Asia Minor)  examples

Easter, the most important Christian religious holy day or feast.  examples

Orthodox Christian church services during the week succeeding Easter.  examples

(attributive) Pertaining to either Passover or Easter (Pascha is an ambiguous term and its meaning depends on context).  examples