function
The function of a heart is to pump blood throughout the body.
The heart's role is to circulate blood.
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.
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.
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.
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
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.