functional

Meanings

Adjective

• In good working order.
• Useful; serving a purpose, fulfilling a function
• Only for functional 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.

Noun

• 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 or complex valued) functions and whose value belongs to a monodimensional space. An example is the definite integration of integrable real functions in a real interval.
• A scalar-valued linear function on a vector space.
• An object encapsulating a function pointer (or equivalent).

Related

Similar words

• functioning, working
• utilitarian

Opposite words

• dysfunctional
• non-functional, nonfunctional, unfunctional
• organic

Narrower meaning words

• algofunctional
• crossfunctional
• difunctional
• hyperfunctional
• hypofunctional
• isofunctional
• metafunctional
• monofunctional
• morphofunctional
• myofunctional
• organofunctional
• parafunctional
• semifunctional
• subfunctional
• ultrafunctional

Origin

• function + -al