1to issue (an order, decree etc); to send out; to dispatch
2to produce (a sound); to let out (a laugh)
Examples
dāng当nǐ你hē喝tāng汤de的shí hou时候bú yào不要fā chū发出shēng yīn声音。
当你喝汤的时候不要发出声音。
Don't make noise while eating soup.
不要发出声音。
Don't make a noise.
为什么对面楼的窗户里发出红光?
Why is there a red light coming out the window in the building across?