adjective
- pertaining to 800 or a period of 800 years; marking the completion of 800 years.
noun, plural oc·to·cen·ten·ar·ies.
- an 800th anniversary or its celebration.
noun plural -naries
- an eight-hundredth anniversary
adjective
noun, plural oc·to·cen·ten·ar·ies.
noun plural -naries