designed for or capable of a particular function or use
involving or affecting function rather than physiology
with respect to function
(of e.g. a machine) performing or capable of performing
fit or ready for use or service
a call that passes control to a subroutine; after the subroutine is executed control returns to the next instruction in main program
relating to or based on function especially as opposed to structure; it is a functional one"
designed for or adapted to a function or use