Hyperosmolarity refers to a condition in which the concentration of solutes (such as salts and sugars) in the blood or other body fluids is higher than normal. Osmolarity is a measure of the osmotic concentration of a solution, indicating the number of particles (osmoles) per unit of solvent.
Unit 7,
Reference: Oxford Concise Medical Dictionary (9th ed) Oxford University Press 2015 ISBN-13: 9780199687817, p1652