To repost another user's message on the social networking website Twitter.(verb)
A message reposted in this way.(noun)
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Use "retweet" in a sentence
"She has thousands of followers, so when Manny has a message he wants to get out, I ask my friend Meg to "pls RT" which means "retweet" - it's saying, "I liked reading this, and maybe you will too"."
"Sexting is defined as "the sending of sexually explicit photographs or messages via mobile phone", while to retweet is to "repost or forward a message on Twitter"."
"Politico said the retweet is a hint that Palin supports the repeal."