Simple past tense and past participle of message.(verb)
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Use "messaged" in a sentence
"In fact, I knew to be excited about it because Kevin messaged me, and first thing I read about them online was David Weinberger’s encomium, and when Kevin and David are excited about something, I know enough to realize that it’s good."
"But I was the pollster who "messaged" it, testing how voters responded to the language."
"“She just kind of messaged me out of nowhere, commenting on my profile picture,” Mr. Hansen said."