To take active responsibility for a group or process, especially within an organization.
To remain present in a retail business, in order to maintain the security of the premises and to serve customers.
To provide a service to (someone); to act as a servant to (someone); to serve (someone) as a waiter or waitress in a restaurant.
To wait for (a person).
To wait for (a thing, or an event to take place).
To fly above its master, waiting till game is sprung.
To be in store for (someone).