lit. Even if we don't see each other, don't give up and leave (idiom)
fig. Be sure to wait!
See you there!
Definitions (粵典–words.hk)
語句
指約人嘅時候,對方冇如時出現都要等到大家出現為止 waiting people till they show up; used when telling people to show up and not to be late
今晚七點公園等,不見不散。
今晚七点公园等,不见不散。
gam1 maan5 cat1 dim2 gung1 jyun2 dang2, bat1 gin3 bat1 saan3. We'll see at the park tonight at 7. We shall wait until we see each other.
Definitions (Wiktionary)
phrase, idiomatic
to stay put until other people have arrived