1to gather together, pool or collect
2to happen by chance
3to move close to
4to exploit an opportunity
Examples
nǐ你xū yào需要liǎng两gè个cái néng才能còu凑chéng成yí一duì对。
你需要两个才能凑成一对。
You need two to make a pair.
我们所有人凑份子给老师买生日礼物。
We all chipped in to buy our teacher a birthday present.
我凑到你耳边说。
Let me whisper in your ear.