The term 'RAPID JUMP' is a combination of two words, 'RAPID' and 'JUMP'. The word 'RAPID' means to move quickly or to do something in a short amount of time. The word 'JUMP' refers to an action of leaping or jumping from one place to another. The crossword solution for this term is 'UPSURGE', which means a sudden increase or rise in something. Therefore, the term 'RAPID JUMP' can be interpreted as a sudden increase or rise that happens quickly.