1to bloom; to blossom; to flower
2(fig.) to burst; to split open
3(fig.) to burst with joy
4(fig.) to spring up everywhere; to flourish
Examples
zhè xiē这些huā花bǐ比bié de别的huā花zǎo早kāi huā开花。
这些花比别的花早开花。
These flowers bloom earlier than others do.
过两三天就要开花了。
The blossoms will be out in a few days.
春季的时候，中国北边很冷，所以在外边的花不开花。
North China is cold in spring, so flowers don't bloom outdoors.