(Especially in the Roman Catholic Church) a period of three days' observance, specifically Maundy Thursday, Good Friday, and Holy Saturday.
More example sentences
- He added Lent was at one time in the Anglican body celebrated only on three days, called the triduum - Maundy Thursday, Good Friday and Holy Saturday.
- The week works its way up to the Friday-Saturday-Sunday triduum.
- The triduum in honour of the Sacred Heart will begin next Wednesday, June 25 at 7.30 pm and will continue at the same hour on Thursday and Friday.
Latin, from tri- 'three' + dies 'day'.