Knife - meaning and definition. What is Knife
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What (who) is Knife - definition

TOOL WITH A CUTTING EDGE OR BLADE
Knives; Knive; Knifes; Fish knife; Kiridashi (knife); Bladed article
  • A Head knife (Round knife).
  • cKc pen knife
  • pattern-welded]] steel
  • tang]] survival knife. The metal from the blade extends into the handle.
  • right
  • A traditional knife handle made from buffalo horn ([[Tasikmalaya]], Indonesia)
  • Characteristic parts of a knife
  • Knives for cutting [[cheese]]
  • Knife blades have different profiles
  • Morakniv carbon steel knife
  • An OTF knife, showing the sliding blade being extended from the handle
  • A [[Swiss Army knife]]
  • The Sacrifice of Isaac]]'' by [[Caravaggio]], (1590–1610; Oil on canvas; [[Uffizi]]). [[Abraham]] is holding the [[sacrificial]] knife.
  • Tuareg]] knife.

knife         
(knives, knifes, knifing, knifed)
Frequency: The word is one of the 3000 most common words in English.
Note: 'knives' is the plural form of the noun and 'knifes' is the third person singular of the present tense of the verb.
1.
A knife is a tool for cutting or a weapon and consists of a flat piece of metal with a sharp edge on the end of a handle.
...a knife and fork...
Two robbers broke into her home, held a knife to her throat and stole her savings.
N-COUNT
2.
To knife someone means to attack and injure them with a knife.
Dawson takes revenge on the man by knifing him to death...
VERB: V n prep
3.
A surgeon's knife is a piece of equipment used to cut flesh and organs during operations. It is made of metal and has a very thin sharp edge.
= scalpel
N-COUNT
If you go under the knife, you have an operation in a hospital.
Kelly was about to go under the knife when her surgeon stopped everything.
PHRASE: PHR after v
4.
5.
If someone does something like a knife through butter or like a hot knife through butter, they do it very easily.
Spending by Japanese companies has left them more competitive than companies in other nations. They will be cutting through the competition like a hot knife through butter.
PHRASE: knife inflects, PHR after v
6.
If you have been in a place where there was a very tense atmosphere, you can say that you could have cut the atmosphere with a knife. (mainly BRIT)
PHRASE
7.
If a lot of people want something unpleasant to happen to someone, for example if they want them to lose their job, you can say that the knives are out for that person. (mainly BRIT)
The Party knives are out for the leader.
PHRASE: V inflects, usu PHR for n
8.
If you twist the knife or if you turn the knife in someone's wound, you do or say something to make an unpleasant situation they are in even more unpleasant.
Travis twisted the knife by laughing at her...
PHRASE: V inflects
knife         
¦ noun (plural knives) a cutting instrument consisting of a blade fixed into a handle.
?a cutting blade on a machine.
¦ verb
1. stab with a knife.
2. cut like a knife.
Phrases
before you can say knife informal very quickly.
get (or stick) the knife into (or in) informal be malicious or vindictive towards.
go (or be) under the knife informal have surgery.
Derivatives
knife-like adjective
knifer noun
Origin
OE cnif, from ON knifr, of Gmc origin.
knife         
n.
instrument for cutting
1) to plunge a knife into smb.
2) to pull a knife (on smb.)
3) to stab smb. with a knife
4) to sharpen a knife
5) a dull; sharp knife
6) a bowie; boy-scout; bread; butcher (esp. AE). butcher's (esp. BE); clasp; electric; flic (BE; AE has switchblade); hunting; kitchen; paper (BE; AE has letter opener); paring; pocket; sheath; steak; trench knife
surgery
7) under the knife (she was under the knife for two hours)

Wikipedia

Knife

A knife (PL: knives; from Old Norse knifr 'knife, dirk') is a tool or weapon with a cutting edge or blade, usually attached to a handle or hilt. One of the earliest tools used by humanity, knives appeared at least 2.5 million years ago, as evidenced by the Oldowan tools. Originally made of wood, bone, and stone (such as flint and obsidian), over the centuries, in step with improvements in both metallurgy and manufacturing, knife blades have been made from copper, bronze, iron, steel, ceramic, and titanium. Most modern knives have either fixed or folding blades; blade patterns and styles vary by maker and country of origin.

Knives can serve various purposes. Hunters use a hunting knife, soldiers use the combat knife, scouts, campers, and hikers carry a pocketknife; there are kitchen knives for preparing foods (the chef's knife, the paring knife, bread knife, cleaver), table knife (butter knives and steak knives), weapons (daggers or switchblades), knives for throwing or juggling, and knives for religious ceremony or display (the kirpan).

Examples of use of Knife
1. "I‘ll bring a knife to a knife fight," he told Democrats on Sunday.
2. A 12–14cm knife, possibly a kitchen or hunting knife, has not yet been recovered.
3. Then he took out a knife and threatened me by pointing the knife at me.
4. Put the knife away."" Gavin took the knife from Eastmond and then started to walk away.
5. His brother Chris, 42, said: "Every time I look at a knife, a small knife, an ordinary knife, I wonder was it like this?