<p><strong>Noun</strong></p><ul><li>a pit, well, or the like in which water or other liquid is collected</li><li>Machinery: a chamber at the bottom of a machine, pump, circulation system, etc., into which a fluid drains before recirculation or in which wastes gather before disposal</li><li>Mining: a space where water is allowed to collect at the bottom of a shaft or below a passageway</li><li>a pilot shaft or tunnel pushed out in front of a main bore</li><li>British: crankcase</li><li>British Dialect: a swamp, bog, or muddy pool</li></ul>