Renal/ˈriːnl/ Definition 1 of 1Pro Tip 1/3Medical Context Use 'renal' when discussing medical topics concerning the kidneys. Her research focuses on renal diseases. Pro Tip 2/3Technical Term 'Renal' is a technical term; use it in formal medical or scientific discussions. Renal function tests determine kidney health. Pro Tip 3/3Health Conditions Combine 'renal' with words like 'failure', 'disease', to describe kidney-related health problems. He was diagnosed with renal impairment.