noun:the action of helping or doing work for someone
The hotel is known for its excellent customer service.
noun:a system or organization that provides something to the public
The bus service in the city is very reliable.
verb:to perform maintenance or repair work on a vehicle or machine
It's important to service your car regularly to keep it running well.
noun:the act of serving in tennis, volleyball, or other sports
Her powerful service won her the point.