1. to express or manifest (thoughts, feelings, or internal states) outwardly
Usage: British spelling; American spelling is ‘externalizes’
2. to attribute (one’s own thoughts or feelings) to external causes or other people
Usage: psychology
3. to make something internal become external or visible

Examples

• She externalises her anxiety through constant fidgeting.
• The therapy helps patients who externalise blame for their problems.
• His art externalises his inner emotional turmoil.
• The company externalises its IT services to reduce costs.
• Children often externalise their fears through play.
• The software externalises complex data in simple charts.