a slender surgical instrument for examining a cavity
a slender pointed metal conductor, e.g. of electricity or sound, that is temporarily connected to or inserted in something to be monitored or measured
an unmanned spacecraft used to explore and send back information from space
a flexible tube used in refuelling an aircraft in flight
the act or an instance of probing
a tentative exploratory survey
a penetrating or critical investigation, esp one carried out by a newspaper into corruption; an enquiry
[late Latin proba examination, from Latin probare: see prove]