1. (v. t.) To examine, to search through; to explore; as a wound or ulcer, with a probe.

2. (v. t.) Fig.: to search to the bottom; to scrutinize or examine thoroughly.

3. (n.) An instrument for examining the depth or other circumstances of a wound, ulcer, or cavity, or the direction of a sinus, of for exploring for bullets, for stones in the bladder, etc.