also: ぎょうねん
noun
age at death
Used in obituaries, memorials, and formal contexts to state the age a person died. Often followed by a number, e.g., 行年八十歳.
祖父の行年は九十二歳でした。
My grandfather's age at death was 92.
墓碑には「行年七十五歳」と刻まれていた。
The gravestone was inscribed with 'died at the age of 75'.
享年 is a more common synonym for 'age at death' and is used in similar formal contexts. 行年 is slightly less frequent but interchangeable.
Compound of 行 (go, pass) and 年 (year), literally 'the years one has passed through'. The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning 'age at death'.