serve no purpose

:  to be a servant

:  to do military or naval service

:  to assist a celebrant as server at mass

:  the act or action of putting the ball or shuttlecock in play in various games (such as volleyball, badminton, or tennis)

:  a turn to serve

:  something set up as an object or end to be attained :  intention

:  resolution, determination

:  a subject under discussion or an action in course of execution

:  to propose as an aim to oneself