Technology / Aviation / Knock: A loud banging noise made inside a reciprocating engine cylinder during the compression stroke. The knock is an explosion rather than a smooth burning process, and is caused by the almost instantaneous release of heat energy from fuel in an aircraft engine caused by the fuel air mixture reaching its critical pressure and temperature.

Other Words for Knock

Knock Verb Synonyms: strike, hit, rap, thwack, whack, thump, bang, tap
Knock Noun Synonyms: criticize, deprecate, carp or cavil at, disparage, put down, run down


Entertainment / Golf / Knockdown: (also 'knockdown shot, punch, punch shot, half shot') a shot played with less than a full swing, mainly to control distance, trajectory and spin MORE

Knockando Single Malt Scotch 12 Year

Entertainment / Liquor / Knockando Single Malt Scotch 12 Year: The most familiar brand, Knockando, is matured at least 12 years MORE

Knee Knocker

Entertainment / Golf / Knee Knocker: (also 'tester') a short putt that, for whatever reason, is challenging (not a gimme) MORE