Can you explain what is meant by an 'object' in object-oriented programming?

In object-oriented programming (OOP), an object is an instance of a class that combines data (fields, properties) and methods (functions) that work with this data.

An object represents a specific entity with a state and behavior. The state is defined by the values of its fields, and the behavior by methods that can modify the state or perform actions.

For example, a "Car" class describes general characteristics and actions, and an object is a specific car with a certain color, make, and speed.

Example in Java:

class Car {
    String color;
    int speed;

    void accelerate(int increment) {
        speed += increment;
    }
}

Car myCar = new Car();
myCar.color = "red";
myCar.speed = 0;
myCar.accelerate(10); // increase speed

Thus, an object is a specific instance of a class with its own state and behavior.