The act of diminishing; reducing in size, quantity, or quality.
1902, G. K. Chesterton, “The Characteristics of Robert Louis Stevenson” in G. K. Chesterton and William Robertson Nicoll, Robert Louis Stevenson, London: Hodder and Stoughton, p. 9,
All great men possess in themselves the qualities which will certainly lay them open to censure and diminishment; but these inevitable deficiencies in the greatness of great men vary in the widest degree of variety.
1929, William Faulkner, The Sound and the Fury, New York: Vintage, 1946, Appendix, “Quentin,” p. 424,
[…] this was Jason’s rage, the red unbearable fury which on that night and at intervals recurring with little or no diminishment for the next five years, made him seriously believe would at some unwarned instant destroy him […]