# functional

> English word · Adjective · IPA /ˈfʌŋkt͡ʃənəl/ · frequency rank #4,761

## Definitions
1. In good working order.
2. Useful; serving a purpose, fulfilling a function.
3. Only for functional purposes, notably in architecture.
4. Of or relating to one's role or office; official.
5. Characterizing functioning in environment, being symptoms that do not presuppose alteration of organic structure.
6. Optimized for all-around physiological benefit.
7. Of or relating to a function or functions.
8. Having semantics defined purely in terms of mathematical functions, without side-effects.

## Etymology
From function + -al.

## Easily confused with
- **functions** (https://plainspell.com/en/vs/functional-vs-functions)
- **functionally** (https://plainspell.com/en/vs/functional-vs-functionally)
- **function** (https://plainspell.com/en/vs/function-vs-functional)
- **fictional** (https://plainspell.com/en/vs/fictional-vs-functional)
- **factional** (https://plainspell.com/en/vs/factional-vs-functional)
- **fractional** (https://plainspell.com/en/vs/fractional-vs-functional)

## Common misspellings (15)
`ffunctional`, `fnuctional`, `fucntional`, `funcctional`, `funcitonal`, `functinoal`, `functioanl`, `functionall`, `functionla`, `functionnal`, `functoinal`, `functtional`, `funnctional`, `funtcional`, `ufnctional`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/functional