/ ˈiːstə(r); NAmE / noun
1.
[ U , C ] (also ˌEaster ˈDay , ˌEaster ˈSunday ) (in the Christian religion) a Sunday in March or April when Christians remember the death of Christ and his return to life
2.
(also East·er·time ) the period that includes Easter Day and the days close to it :
the Easter holidays / vacation
For more information see the Cultural Guide
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WORD ORIGIN
Old English ēastre ; of Germanic origin and related to German Ostern and east ; perhaps from Ēastre , the name of a goddess associated with spring.