Noun
(engineering) A point in between moving and stationary parts of a machine where an individual's body part may become caught, leading to injury
(economics) The level of inventories of a commodity or product below which consumers become concerned about security of supply
(mathematics) Cuspidal point, a type of singular point on an algebraic surface
A kerb extension, a traffic calming measure consisting of an angled narrowing of the roadway
A bottleneck, part of a process that is too slow and causes a delay.
Source: en.wiktionary.org