1. Designed for or capable of a particular function or use
   "functional education selects knowledge that is concrete and usable rather than abstract and theoretical"; "a style of writing in which every word is functional"; "functional architecture"
    
2. (pathology) involving or affecting function rather than physiology
   "functional deafness"
    
3. Relating to or based on function especially as opposed to structure
   "the problem now is not a constitutional one: it is a functional one"; "delegates elected on a functional rather than a geographical basis"
    
4. Fit or ready for use or service
   "the toaster was still functional even after being dropped";
   - usable, useable, operable, operational, up and running
    
5. (of e.g. a machine) performing or capable of performing
   "in functional order"; "a functional set of brakes";
   - running, operative, working

See also: function, functioning, practicable, practical, purpose, role, serviceable, structural, use, useful, utilitarian

Antonym: nonfunctional, organic

Encyclopedia: Functional