1func·tion 
/ˈfʌŋkʃən/ noun
plural func·tions /ˈfʌŋkʃən/ noun 1 : the special purpose or activity for which a thing exists or is used [count] ▪ The function of the heart is to pump blood through the body. ▪ He believes that the true function of art is to tell the truth. ▪ What functions do these programs fulfill/perform/serve? ▪ infants learning to control their bodily functions [noncount] ▪ The instrument is chiefly used to measure and record heart function. ▪ The design achieves a perfect blend of form and function. 2 [count] : the job or duty of a person
▪ His job combines the functions of a manager and a worker. ▪ Her chief/main/primary/principal function is to provide expert legal advice. 3 [count] : a large ceremony or social event
▪ They went to several functions during their college reunion weekend. ▪ a social function 4 [count] a : something (such as a quality or measurement) that is related to and changes with something else
▪ Height is a function of age in children. [=the height of children increases as their age increases]
b : something that results from something else
▪ His personal problems are a function of [=a result of] his drinking.
▪ His job combines the functions of a manager and a worker. ▪ Her chief/main/primary/principal function is to provide expert legal advice.
▪ They went to several functions during their college reunion weekend. ▪ a social function
▪ Height is a function of age in children. [=the height of children increases as their age increases]
b : something that results from something else
▪ His personal problems are a function of [=a result of] his drinking.
