knock
Definition from Wiktionary, a free dictionary
Contents |
[edit] English
[edit] Etymology
Akin to Old Norse knoka (compare Danish knuge, to hug) and Middle High German knochen, to hit.
[edit] Pronunciation
[edit] Noun
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Singular |
Plural |
knock (plural knocks)
- An abrupt rapping sound, as from an impact of a hard object against wood
- I heard a knock on my door.
- An impact.
- He took a knock on the head.
- (cricket) a batsman's innings.
- He played a slow but sure knock of 35.
- (automotive) A type of abnormal combustion occuring in spark ignition engines. Normally a flame front advances progressively out from the spark, but when knock occurs unburnt air/fuel ahead of the flame self-ignites under the heat and pressure, producing a characteristic knocking sound and a sudden further increase in pressure which can be very damaging to the engine.
[edit] Translations
an abrupt rapping sound
an impact
- The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.
[edit] Verb
|
Infinitive |
Third person singular |
Simple past |
Past participle |
Present participle |
to knock (third-person singular simple present knocks, present participle knocking, simple past and past participle knocked)
- To rap one's knuckles against something, especially wood.
- Knock on the door and find out if they're home.
- To bump or impact.
- I knocked against the table and bruised my leg.
- (colloquial) To denigrate, undervalue.
- Don't knock it until you've tried it.
[edit] Translations
to rap one's knuckles against something
to bump or impact
- The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.
[edit] Derived terms
Terms derived from the noun or verb "knock"
