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function

The natural purpose of something. / A formal social event. / A relationship between two variables in mathematics. / To work or operate in a proper way. / To serve a specific purpose or role.

/ˈfʌŋ(k)ʃən/

Intransitive Verb[C/U] Both
pl: functionspast: functionedpp: functioninging: functionalcomp: more functionalsup: most functional

Countable as a purpose or event; uncountable in certain mathematical contexts.

💬Casual Conversation

🎬Tuesday afternoon, Mark is pretending to work at his desk while Brian is in the server room.
Mark

yo my keyboard is totally bunk. it won't function if i don't jiggle the cord.

yo my keyboard is totally bunk. it won't function if i don't jiggle the cord.

Mark
Brian
Brian

did you restart it or are you just messing around?

did you restart it or are you just messing around?

Meanings

Noun

The natural purpose of something.

It has a function.

Noun

A formal social event.

Attend a function.

Noun

A relationship between two variables in mathematics.

Study the function.

Intransitive VerbTo work or operate in a proper way.

To work or operate in a proper way.

Intransitive VerbTo serve a specific purpose or role.
[~ as something]

To serve a specific purpose or role.

Examples

What is the primary function of this button?

I can't even remember the function of this gadget.

Look, this tool's function is simple: just pull the lever!

plumber-emergency
job-interview

My brain just stopped its basic function during the test.

I'm not coming to some boring corporate function tonight.

office-gossip
awkward-date
customer-service

I think y is a function of x here.

Does this elevator even function anymore?

I can't function without my morning coffee, seriously.

roommate-argument

Stop it! This table doesn't function as a drum!

roommate-argument

Collocations & Compounds

primary function

the most important purpose

optimal function

working at the best possible level

serve a function

to be useful for a specific purpose

The decorative pillars actually serve a function by supporting the roof.

biological function

a process occurring in a living organism

dual function

having two different purposes

The garment has a dual function as both a coat and a sleeping bag.

Etymology

Derived from the Latin 'functio(n)is', meaning 'performance' or 'execution', which stems from the verb 'fungi', meaning 'to perform' or 'discharge' (from 'funis', meaning 'rope', metaphorically referring to the paying out of a rope as one completes a task). It entered English in the mid-17th century, initially referring to the performance of an office or duty.

Related Words

Last Updated: May 2026Report an Error