The term 'TERRIFIC SERVE' can be broken down into two words, 'TERRIFIC' and 'SERVE'. The word 'TERRIFIC' is an adjective meaning 'extremely good or excellent'. The word 'SERVE' is a verb meaning 'to provide what is needed or wanted'. The crossword solution for the term 'TERRIFIC SERVE' is 'ACE', which is a noun meaning 'a SERVE in tennis that is not returned by the opponent'. Therefore, the term 'TERRIFIC SERVE' can be defined as an extremely good or excellent SERVE in tennis that is not returned by the opponent.