The hole in a lock where the key is inserted and turns. / Any small opening resembling the hole for a key in shape or function.

(firearms) To strike a target after wobbling in flight so that the long axis of the bullet does not follow the line of flight, typically due to insufficient spin resulting from the rifling in the barrel.

plural of keyhole

Third-person singular simple present indicative form of keyhole

simple past tense and past participle of keyhole

present participle of keyhole

(firearms) The tendency of a bullet fired down an excessively large barrel to wobble in flight and leave a keyhole-shaped puncture in the target.

(medicine) Surgery using a fibre-optic laparoscope through a small incision, either for examination or treatment

plural of gravitational keyhole

(astronomy) A tiny region of space where a planet's gravity would alter the orbit of a passing asteroid such that the asteroid would collide with that planet on a given future orbital pass.