Knock may refer to:

Places

Northern Ireland

* Knock, Belfast, County Down * Knock, County Armagh, a townland in County Armagh

Republic of Ireland

* Knock, County Clare, village in County Clare * Knock, County Mayo, village in County Mayo * Knock Shrine, a major Roman Catholic pilgrimage site in the village of Knock, County Mayo * Ireland West Airport Knock, commonly known as Knock Airport

Scotland

* Knock, Mull, a place on the

Isle of Mull The Isle of Mull ( gd, An t-Eilean Muileach ) or just Mull (; gd, Muile, links=no ) is the second-largest island of the Inner Hebrides (after Skye) and lies off the west coast of Scotland in the council area of Argyll and Bute. Covering ...

, Argyll and Bute, Scotland * Knock, Moray, a location * Knock, Isle of Lewis, Outer Hebrides * Knock railway station (Scotland), Aberdeenshire

Elsewhere

* Knock, Cumbria, England * Knock, East Frisia, Germany

Art and entertainment

* ''Knock'' (play), 1923, by Jules Romains about a doctor * "Knock" (short story), by Fredric Brown, supposedly the shortest short-story ever written * '' The Knock'' (1994-2000), a UK television drama * " The Knock (Drums of Death, Pt. 2)", a song by UNKLE from the album ''Psyence Fiction'' (1998) * '' Knock'', a 2017 French film starring Omar Sy

Other uses

* Knock, to rap on a

door A door is a hinged or otherwise movable barrier that allows ingress (entry) into and egress (exit) from an enclosure. The created opening in the wall is a ''doorway'' or ''portal''. A door's essential and primary purpose is to provide security b ...

* Knock, a slang term meaning to render a negative evaluation or assessment *

Engine knocking In spark ignition internal combustion engines, knocking (also knock, detonation, spark knock, pinging or pinking) occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignit ...

, in spark-ignition internal combustion engines * Knock Nevis, a Norwegian supertanker formerly known as Seawise Giant, Happy Giant, and Jahre Viking * The Knock, another term for hitting the wall * The Knock, a slang term for ''

HM Revenue and Customs HM Revenue and Customs (His Majesty's Revenue and Customs, or HMRC) is a non-ministerial government department, non-ministerial Departments of the United Kingdom Government, department of the His Majesty's Government, UK Government responsible fo ...