Dialysis/ˌdaɪˈæləsɪs/ Definition 1 of 2Pro Tip 1/3Health Context It's used in a health context referring to a crucial life-sustaining procedure. After the accident, she needed urgent dialysis. Pro Tip 2/3Regular Sessions Dialysis often requires regular sessions over a long period, not just one-time treatment. My grandfather has dialysis sessions twice a week. Pro Tip 3/3Serious Condition It implies the seriousness of kidney issues and may evoke sympathy or concern. She has been on dialysis since her kidneys failed last year.