Noun
1. a mathematical relation such that each element of one set is associated with at least one element of another set
2. what something is used for;
"the function of an auger is to bore holes""ballet is beautiful but what use is it?"3. the actions and activities assigned to or required or expected of a person or group;
"the function of a teacher""the government must do its part""play its role"4. a relation such that one thing is dependent on another;
"height is a function of age""price is a function of supply and demand"5. a formal or official social gathering or ceremony;
"it was a black-tie function"6. a vaguely specified social event;
"the party was quite an affair""an occasion arranged to honor the president""a seemingly endless round of social functions"7. a set sequence of steps, part of larger computer program