second anniversary of a death
Buddhist memorial service held on the second anniversary of a person's death. Counted inclusively: the first anniversary is 一周忌, the second is 三回忌.
We held a memorial service for my grandmother on the second anniversary of her death.
From 三 (three) + 回 (times) + 忌 (mourning), referring to the third year counting inclusively from the death, i.e., the second anniversary.