Usage note
宣布的意思是正式告诉大家一件事，比如宣布比赛结果。
Xuānbù de yìsi shì zhèngshì gàosu dàjiā yī jiàn shì, bǐrú xuānbù bǐsài jiéguǒ.
To announce means to formally tell everyone something, like announcing competition results.
Context note
老师或领导经常宣布消息，比如放假通知或活动安排。
Lǎoshī huò lǐngdǎo jīngcháng xuānbù xiāoxi, bǐrú fàngjià tōngzhī huò huódòng ānpái.
Teachers or leaders often announce news, like holiday notices or activity schedules.
5 examples
老师宣布明天放假。
lǎo shī xuān bù míng tiān fàng jià。
The teacher announced that tomorrow is a holiday.
校长宣布了运动会的时间。
xiào zhǎng xuān bù le yùn dòng huì de shí jiān。
The principal announced the time of the sports meet.
爸爸宣布我们要去旅行。
bà ba xuān bù wǒ men yào qù lǚ xíng。
Dad announced that we are going on a trip.
比赛结束后，裁判宣布了赢家。
bǐ sài jié shù hòu， cái pàn xuān bù le yíng jiā。
After the game, the referee announced the winner.
妈妈宣布晚餐准备好了。
mā ma xuān bù wǎn cān zhǔn bèi hǎo le。
Mom announced that dinner is ready.
5 mini stories
老师宣布下周有春游。同学们都很兴奋。
lǎo shī xuān bù xià zhōu yǒu chūn yóu。 tóng xué men dōu hěn xīng fèn。
The teacher announced a spring outing next week. The classmates are all excited.
爸爸宣布我们养了一只小狗。我高兴得跳了起来。
bà ba xuān bù wǒ men yǎng le yì zhī xiǎo gǒu。 wǒ gāo xìng dé tiào le qǐ lái。
Dad announced that we got a puppy. I jumped with joy.
校长宣布了阅读比赛的结果。小明得了第一名。
xiào zhǎng xuān bù le yuè dú bǐ sài de jié guǒ。 xiǎo míng dé le dì yī míng。
The principal announced the results of the reading contest. Xiao Ming got first place.
妈妈宣布今天吃饺子。全家一起包饺子。
mā ma xuān bù jīn tiān chī jiǎo zǐ。 quán jiā yì qǐ bāo jiǎo zǐ。
Mom announced that we are having dumplings today. The whole family makes dumplings together.
老师宣布了班级的清洁计划。大家都很配合。
lǎo shī xuān bù le bān jí de qīng jié jì huà。 dà jiā dōu hěn pèi hé。
The teacher announced the class cleaning plan. Everyone cooperated well.
Mini dialogue
宣布消息
A
老师宣布明天有考试。
Lǎoshī xuānbù míngtiān yǒu kǎoshì.
The teacher announced there is a test tomorrow.
B
真的吗？我需要复习。
Zhēn de ma? Wǒ xūyào fùxí.
Really? I need to review.
宣布结果
A
校长宣布了比赛结果。
Xiàozhǎng xuānbù le bǐsài jiéguǒ.
The principal announced the competition results.
B
我们班赢了吗？
Wǒmen bān yíng le ma?
Did our class win?
Related words and contrasts
similar
告诉
gàosu
tell
告诉 means to tell someone; 宣布 is more formal, like announcing to a group.
related
通知
tōngzhī
notify
通知 means to notify or inform, often used for official notices.
opposite
保密
bǎomì
keep secret
保密 means to keep something secret, the opposite of announcing.