All 7 Uses

function
in
The Blind Assassin
(Edited)

She threw open Avilion for these functions, which (said Reenie) was hard on the floors.
p. 72.5

functions = social events
From what I'd heard about Mother, she might have insisted I be sent to school — the Alma Ladies' College, or some such worthy, dreary institution — to learn something functional but equally dreary, like shorthand; but as for a debut, that would have been vanity.
p. 168.5 *

functional = useful
It was a costume ball — such functions mostly were, because people at that time liked costumes.
p. 332.6

functions = social events
These functions were by invitation only.
p. 333.3
She continued to haul me around from function to function — Junior League meetings, political bun-fests, committees for this and that — and to park me on chairs and in corners, while she did the necessary socializing.
p. 370.5 *

function = event
She continued to haul me around from function to function — Junior League meetings, political bun-fests, committees for this and that — and to park me on chairs and in corners, while she did the necessary socializing.
p. 370.5
Crude references to bodily functions usually put a stop to Myra.
p. 373.3

functions = natural activities

Definitions:

(1) (function as in: Its main function is to...)
purpose, job, or natural activity
(2) (function as in: can't function well without sleep)
work or operate -- sometimes to work or operate normally or in a particular way
(3) (function as in: I'm attending a function tonight)
a social event or ceremony -- especially one attended for work or out of a sense of duty
(4) (function as in: oxygen is a function of altitude)
saying one results from another; or saying that the amount of one thing is dependent upon the value of another.

If x is a function of y, then x results from y; or the amount of x can be calculated based on the amount of y.
(5) (function as in: Amazon's new search function)
computer code that performs a specific task
(6) (function as in: a mathematical function)
a formula or mathematical expression that describes a relationship between variables
(7) (meaning too rare to warrant focus)
For more specialized meanings in math and chemistry, see a comprehensive dictionary.