adj 1 a  :  of, connected with, or being a function - compare STRUCTURAL1    b  :  affecting physiological or psychological functions but not organic structure < heart disease>  <a psychosis>  - compare ORGANIC1b    2  :  performing or able to perform a regular function func*tion*al*ly adv 
 
   
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.