ON THE APEX' The term 'On the Apex' is a phrase that is used to describe something that is at the highest point or peak of its success. It is often used to refer to a person or thing that has achieved the highest level of success or recognition in their field. The crossword solution for this term is ATOP, which is a four-letter word meaning 'at the highest point'. This phrase is often used to describe someone or something that has reached the pinnacle of success or recognition.