Significat

1. to realise random people have a life (the realisation that each random passerby is living a life as vivid and complex as your own)
2. to probe (test with a probe)
3. to probe (test the depth of something)
4. to probe (test the depth of something)
5. to probe (look carefully around)
6. to probe (ask someone many questions, in order to find something out)
7. to survey and take measurements using a weather balloon
8. to survey (carry out a survey or poll)
9. to dive down