Functional
Part of speech: noun
Definition: A function that takes a function as its argument; More precisely: A function y=f(x) whose argument x varies in a space of (real valued, complex valued) functions and whose value belongs to a monodimensional space. An example: the definite integration of integrable real functions in a real interval.
Part of speech: adjective
Definition: In good working order. Useful; serving a purpose, fulfilling a function Only for fuctional purposes, notably in architecture Having semantics defined purely in terms of mathematical functions, without side-effects. Of a disease, such that its symptoms cannot be referred to any appreciable lesion or change of structure; opposed to organic disease, in which the organ itself is affected.
Example sentence: I had a lot of trouble with engineers, because their whole background is learning from a functional point of view, and then learning how to perform that function.
Practical
Part of speech: noun
Definition: that part of an exam or series of exams in which the candidate has to demonstrate their practical ability
Part of speech: adjective
Definition: Based on practice or action rather than theory or hypothesisBeing likely to be effective and applicable to a real situation; able to be put to useOf a person, having skills or knowledge that are practical
Example sentence: The assertion that 'all men are created equal' was of no practical use in effecting our separation from Great Britain and it was placed in the Declaration not for that, but for future use.