Delores J. Thoroughman (nee: Dillback), of O'Fallon, MO, died on Monday December 15, 2014 at the age of 80. Loving wife of the late James Oliver Thoroughman; dear daughter of the late Carvel Dillback, Sr. and Stella M. Dillback; devoted mother of Robert (Joyce) E. Thoroughman, Curt Thoroughman, and Roger Thoroughman; dear sister of Pat (Frank) Watson, Kathy Clark, and Mike (Belinda) Dillback; cherished grandmother of Naomi and Hannah; and treasured great-grandmother of Kyle, Matthew, Benjamin, Rachel, Lauren, and Morgan.