1. making something appear greater or more important than it really is; exaggerating the significance of something
Usage: British spelling; American spelling is ‘aggrandizing’; present participle form
2. increasing the power, status, or wealth of someone or something
Usage: British spelling; American spelling is ‘aggrandizing’; present participle form

Examples

• The politician was accused of aggrandising his role in the peace negotiations.
• She had a habit of aggrandising even the smallest achievements.
• The company’s marketing team was aggrandising the benefits of their new product.
• He spent years aggrandising his family’s wealth and influence.
• The biography was criticized for aggrandising the subject’s minor contributions to science.
• Stop aggrandising your part in the project’s success.