1.
a. To arrive: Fall clothes will be coming in soon.
b. To become available for use: New weather information just came in.
c. To start producing. Used of an oil well.
2. To arrive among those who finish a contest or race: came in fifth.
3. To perform or function in a particular way: A food processor comes in handy.
4. To reply in a specified manner to a call or signal: The pilot's voice came in loud and clear.
5. To take on a specified role: When editorial review commences, that's where you come in.