[Eas.ter] n [ME estre, fr. OE eastre; akin to OHG ostarun (pl.) Easter, OE east east] (bef. 12c): a feast that commemorates Christ's resurrection and is observed with variations of date due to different calendars on the first Sunday after the paschal full moon
EASTER
Meaning of EASTER in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012