1 or Quadragesima Sunday: the first Sunday in Lent
2: the 40 days of Lent
History and Etymology for Quadragesima
Late Latin, Lent, first Sunday in Lent, from Latin, feminine of quadragesimus fortieth, from quadraginta forty, from quadra- (akin to Latin quattuor four) + -ginta (akin to Latin -ginti in viginti twenty)