official announcement; formal announcement
A formal public statement, often by an organization, government, or company. Used in news and official contexts.
The official announcement of the new product is scheduled for next week.
The government will make a formal announcement about the new policy tomorrow.
発表 is a general announcement or presentation, while 正式発表 specifically refers to an official or formal announcement.
公式発表 is very similar, often used interchangeably, but 正式発表 may emphasize the procedural formality.
Compound of 正式 (formal, official) and 発表 (announcement).