Definition of "functional" []

• Of or relating to a function. (adjective)
• Of, relating to, or indicating a mathematical function or functions. (adjective)
• Designed for or adapted to a particular function or use: functional architecture. (adjective)
• Capable of performing; operative: a functional set of brakes. (adjective)
• Pathology Involving functions rather than a physiological or structural cause. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• ""You've probably heard of the term functional MRI," she said."
• "In this paper, the term functional ingredients refers to substances purported to improve bodily functioning that are added to traditional foods through a manufacturing or other process."
• "It is important here that I clarify how I am using the term functional in this context."