(countable) A wheel with grooves (teeth) engraved on the outer circumference, such that two such devices can interlock and convey motion from one to the other; a gear wheel.
(countable) A particular combination or choice of interlocking gears, such that a particular gear ratio is achieved.
“Other British privateers of note include Fortunatus Wright, Edward Collier, Sir John Hawkins, his son Sir Richard Hawkins, Michael Geare, and Sir Christopher Myngs.”