Answer:
In this line from Walt Whitman's poem Song of Myself, the meaning of the word leavings is inheritance/legacy.
Explanation:
The speaker expresses what he feels about the life of the other person; he feels his/her life is a consequence of many deaths, that maybe the way of living and the characteristics of that life are what they are because of that deaths, what those deaths left him/her. His/her inheritance/legacy made of his/her life what it is.
