To announce something publicly and clearly, especially something important. It often suggests a strong or official statement.
From Latin *proclamare* meaning 'to shout forth', from *pro-* 'forth' and *clamare* 'to shout'. It came into English through Old French *proclamer*.
To proclaim is basically to 'shout something into the world', whether with a voice, a law, or a tweet. The power of a proclamation depends less on volume and more on who is allowed to speak. The same sentence sounds very different from a friend, a protester, or a president.
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