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function
/ˈfʌŋkʃən/
purpose or role
The function of a heart is to pump blood throughout the body.
The heart's role is to circulate blood.
formal
The purpose or role that something is designed to fulfill.
The function of a teacher is to educate students.
Teaching is the primary role of a teacher.
Often used in technical, mathematical, or biological contexts.
technical
A mathematical operation that relates inputs to outputs.
In the equation y = 2x + 3, y is a function of x.
Here, y depends on the value of x.
Commonly used in algebra and calculus.
formal
A formal or official ceremony or gathering.
The king attended a state function at the palace.
The king participated in an official royal event.
Often used in political or diplomatic contexts.
formal
To work or operate in a proper or particular way.
The machine functions smoothly after the repair.
The machine operates correctly now.
Used to describe the performance of systems or organisms.
Collocations
fulfill a functionto perform a role as intendedserve a functionto act in a role that benefits somethingprimary functionthe main purpose of somethingmathematical functiona relation between inputs and outputs in math
Antonyms
Pro Tip
Distinguish between 'function' as a noun and verb
As a noun, 'function' refers to purpose or role (e.g., 'The function of a light switch is to turn lights on and off'). As a verb, it means to operate or work (e.g., 'The computer functions well').
Gold Rule
Use 'function' for purpose, not for events
Avoid saying 'We attended a function last night' unless the event is formal or official. For casual gatherings, use 'party' or 'event.'
Word Origin
From Latin *functio(n-)*, meaning 'performance, execution,' from *fungi* 'to perform, discharge.' Entered English in the 16th century via French *fonction*.
Usage Notes
In formal contexts, 'function' often refers to the intended purpose of an object or system. In mathematics, it specifically describes a relationship where each input has a single output. Avoid using 'function' to mean 'party' or 'event' in informal settings unless the context is clearly formal.
Word Breakdown
funct-
to perform
root-ion
action or condition
suffixEnglish Dictionary