- probe (n.)
- 1580, "instrument for exploring wounds, etc.," from M.L. proba "examination," in L.L. "test, proof," from L. probare (see prove). Meaning "act of probing" is 1890, from the verb; fig. sense of "penetrating investigation" is from 1903. Meaning "small, unmanned exploratory craft" is attested from 1953. The verb is first recorded 1649 (originally figurative; "to search thoroughly, interrogate"), from the noun.