1.
90th birthday; celebration of one's ninetieth year
A traditional celebration of a person's 90th birthday. The name comes from the informal simplified form of 卒, whose components can be read as 九十 (ninety).
卒寿 celebrates a person's 90th birthday, one of the traditional Japanese longevity milestones (長寿のお祝い). The name comes from the informal simplified form of 卒, whose components can be read as 九十 (ninety); the traditional celebratory color is purple.
Common collocations
Types
Part of a sequence of longevity milestones: 古希 (70), 喜寿 (77), 傘寿 (80), 米寿 (88), 卒寿 (90), 白寿 (99).