The Collaborative International Dictionary of English v.0.48:
five-hitter \five`-hit"ter\ (f[imac]v`-h[i^]t"t[~e]r), n. (Baseball) A game in which a pitcher allows the opposing team 5 hits. Syn: 5-hitter. [WordNet 1.5]WordNet (r) 3.0 (2006):
five-hitter n 1: a game in which a pitcher allows the opposing team 5 hits [syn: five-hitter, 5-hitter]