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: 'Jurassic World' takes place in a fully functional park on Isla Nublar. It sees more than 20,000 visitors every day. You arrive by ferry from Costa Rica. It has elements of a biological preserve, a safari, a zoo, and a theme park. There is a luxury resort with hotels, restaurants, nightlife and a golf course. And there are dinosaurs.
Structural
Part of speech: adjective
Definition: of, relating to, or having structureused in building
Example sentence: To avoid being mistaken for a sellout, I chose my friends carefully. The more politically active black students. The foreign students. The Chicanos. The Marxist professors and structural feminists and punk-rock performance poets.