Types of kidney cysts. There are two known types of kidney cysts, the first is Polycystic Kidney Disease (PKD) which is a genetic disorder of unknown causes and the second type is due to impaired kidney function.
navigates; navigated; navigating. Learner's definition of NAVIGATE. 1. : to find the way to get to a place when you are traveling in a ship, airplane, car, etc. [no object] For thousands of years, sailors navigated by the stars.
Definition of compass for English Language Learners. : 1  a device that is used to find direction by means of a needle that always points north. : 2  something that helps a person make choices about what is right, effective, etc. : 3  a tool that consists of two pointed sticks joined at the top and that is used for measuring distances.