Apportion means to divide something into parts and distribute it according to a particular plan or system. It can refer to dividing up resources, responsibilities, or rewards among individuals or groups based on some agreed-upon criteria. For example, in politics, the process of apportioning congressional seats among states is done according to population data from the latest census. In business, a company may apportion its budget for marketing and advertising between different channels such as social media or print ads based on their perceived effectiveness. The word "apportion" can also refer to the process of allocating blame or credit for something among those involved.