To express or make something visible or tangible, especially feelings or thoughts. She externalised her frustration by shouting at the top of her lungs.
To attribute something, such as a feeling or a thought, to an external cause or object. He externalised his anxiety by blaming the noisy environment for his lack of focus.
To transfer or project something, such as a cost or responsibility, to an outside entity. The company externalised the environmental costs by outsourcing production to another country.
To convert internal data, objects, or processes into a form that can be stored, transmitted, or accessed externally (computing). The framework externalises session data to a shared cache so that it can be retrieved by any server in the cluster.