The term 'abrupt transition' can be summarized as a sudden change from one state to another. The crossword solution for this term is 'LEAP, ' which implies a sudden jump or movement from one place to another. This could refer to a physical movement, such as jumping from one spot to another, or it could refer to a more abstract concept, such as a sudden shift in thought or emotion. In either case, the term 'abrupt transition' implies a sudden and unexpected change.