The Collaborative International Dictionary of English v.0.48:
no-go \no-go\ adj. not functioning properly or in suitable condition for proceeding; as, the space launch was no-go. Opposite of go, a. [WordNet 1.5]WordNet (r) 3.0 (2006):
no-go adj 1: not functioning properly or in suitable condition for proceeding; "the space launch was no-go" [ant: go]