Publicly reiterating and supporting the official party policy; conforming to the party's agreed policies.(adjective)
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Use "on-message" in a sentence
"Of course Bland was always his own man and the line he advanced about the BBC's position in broadcasting was far from wrong, but the challenge posed by new chairmen to senior management has always been to get them on-message."
"Can he stay on-message amid the daily meat grinder that is a presidential primary in the age of blogs and Twitter?"
"The much younger Oxlade-Chamberlain stayed on-message during his post-match interview on Sunday night but there have been suggestions that he is frustrated at not being given more time on the pitch since arriving from Southampton in the summer with a £12m price tag."