1(political, economic etc) affairs
2work
3transaction (as in a computer database)
Examples
tā他wú无quán权gān shè干涉wǒ men我们de的jiā tíng家庭shì wù事务。
他无权干涉我们的家庭事务。
He has no right to interfere in our family affairs.
你没有干涉他人事务的权力。
You have no right to interfere in other people's affairs.
你最好不要插手别人的事务。
It's best if you don't poke your nose into other people's business.