A batter who has failed to make any base hits over a period of time, usually one game(adjective)
A team that has no hits over a period of time, usually part of one game(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "hitless" in a sentence
"The Mets were held to four hits — they went hitless from the second through the eighth innings — and stranded 11 runners in a 3-1 loss to the St. Louis Cardinals on Thursday that abruptly ended a season that for so long seemed as though it would inevitably lead to the World Series."
"But free agent acquisition Drew went 0-for-5 to remain hitless in 22 at-bats this year."
"Tampa Bay's two home runs Sunday set a postseason record for AL teams with 25, but Carlos Pena and Evan Longoria remain hitless."