n.

1. a mathematical relation such that each element of one set is associated with at least one element of another set;
   mathematical function
2. what something is used for;
   purpose, role, use
   
   • 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;
   office, part, role
   
   • 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;
   affair, occasion, social occasion, social function
   
   • 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;
   routine, subroutine, subprogram, procedure

v.

1. perform as expected when applied;
   work, operate, go, run
   
   • The washing machine won't go unless it's plugged in
   • Does this old car still run well?
   • This old radio doesn't work anymore
2. serve a purpose, role, or function;
   serve
   
   • The tree stump serves as a table
   • The female students served as a control group
   • This table would serve very well
   • His freedom served him well
   • The table functions as a desk
3. perform duties attached to a particular office or place or function;
   officiate
   
   • His wife officiated as his private secretary