(exp, v1)to die peacefully; to have lived a full life
少年少女と呼ぶべき年齢の者から、近く大往生を遂げるのではないかという老齢の者の姿まである。 There were figures there from those of an age best called girls and boys to those who looked to be old enough to be about to live out their life span.
Japanese Dictionary
