1 explore, examine, scrutinize, investigate, search (into), look into, go into, study, dig into, delve into, poke about or around, Colloq poke into:
They probed his background thoroughly but found nothing unusual.
2 poke, prod, explore, examine; plumb, dig:
Snipe use their long bills to probe for worms in soft mud.
3 investigation, examination, exploration, scrutiny, search, study, inquiry or enquiry, inquest:
There will be a governmental probe into the mismanagement of the department.