Mother’s Day - definition and synonyms

noun [countable/uncountable] 

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singularMother’s Day
pluralMother’s Days
  1. a special day when you give cards and presents to your mother to show your love for her
Word story
In the UK, Mother’s Day is celebrated on the fourth Sunday in Lent, which falls in March or very early in April. It was originally a church holiday called ’Mothering Sunday’.