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Short definition from Wiktionary

Noun

1. 1
   A short report, especially one released through official channels to be immediately broadcast or publicized.
2. 2
   A time-sensitive news item or short news report.
3. 3
   A short printed publication, especially one produced regularly by an organization.

Verb

1. 1
   To announce (something) by means of such a report or publication.

Interjection

1. 1
   Introduces a fact (presumed to be obvious) of which the person addressed is ostensibly not aware.