The term 'high opinion' can be summarized as having a great deal of ESTEEM or admiration. The crossword solution for this term is 'ESTEEM, ' which is defined as a high regard or respect for someone or something. This term is often used to describe how one feels about another person, such as admiration or appreciation. It can also be used to describe how one feels about an object or concept, such as a strong belief in its value or importance.