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IELTS BNC: 5051 COCA: 4899

bolt

1 bolt /ˈboʊlt/ noun
plural bolts
1 bolt
/ˈboʊlt/
noun
plural bolts
Learner's definition of BOLT
[count] : a bright line of light that appears in the sky during a storm : a flash of lightning闪电;霹雳
often used figuratively in the phrases a bolt from the blue and a bolt out of the blue常用作比喻,用于短语a bolt from the blue和a bolt out of the blue
[count]
: a sliding bar that is used to lock a door or window(门窗的)闩,插销
: the part of a lock that is moved by a key锁簧 see also dead bolt
[count] : a long, round piece of metal that has a wider part at one end and is like a screw at the other end螺栓
◊ A bolt and a nut are used together to hold something in place.螺栓和螺帽一起用来固定某物。
see picture at carpentry; see also nuts and bolts at nut
[singular] British : the act of running or moving quickly and suddenly in a particular direction or to a particular place迅速逃跑;溜走
[count] : a large roll of cloth一匹布
[count] : a tube-shaped metal part inside a gun枪栓;枪机
[count] : a short, heavy arrow that is shot from a type of weapon (called a crossbow) used mainly in the past弩箭
◊ If you have shot your bolt, you have done or used everything possible to try to do something, and there is nothing more that you can do.竭尽全力;智穷才尽
2 bolt /ˈboʊlt/ verb
bolts; bolted; bolting
2 bolt
/ˈboʊlt/
verb
bolts; bolted; bolting
Learner's definition of BOLT
[no object]
always followed by an adverb, adjective, or preposition : to move or go very suddenly and quickly from or to a particular place, position, or condition突然快速移动
: to run away suddenly and quickly逃跑;溜走
US : to suddenly leave a political party, team, etc.突然离开,脱离(政党、团体等)
[no object]
[+ object]
: to fasten (something) tightly : to lock (something) with a bolt闩上
[+ object]
[no object]
[+ object] : to attach (something) firmly : to attach (something) with a bolt固定;用螺栓固定
[+ object] : to eat (food) quickly狼吞虎咽
often + down
3 bolt /ˈboʊlt/ adverb
3 bolt
/ˈboʊlt/
adverb
Learner's definition of BOLT
: with the back in a very straight position笔直地
IELTS BNC: 5051 COCA: 4899

bolt

1 of 5

noun (1)

1
a
: a lightning stroke
also : thunderbolt
b
: a shaft or missile designed to be shot from a crossbow or catapult
especially : a short stout usually blunt-headed arrow
2
a
: a wood or metal bar or rod used to fasten a door
b
: the part of a lock that is shot or withdrawn by the key
3
: a metal rod or pin for fastening objects together that usually has a head at one end and a screw thread at the other and is secured by a nut
4
: a roll of cloth or wallpaper of specified length
5
: a metal cylinder that drives the cartridge into the chamber of a firearm, locks the breech, and usually contains the firing pin and extractor
6
a
: a block of timber to be sawed or cut
b
: a short round section of a log

Illustration of bolt

Illustration of bolt
  • bolt 3

bolt

2 of 5

verb (1)

bolted; bolting; bolts

intransitive verb

1
: to move suddenly or nervously : start
2
: to move or proceed rapidly : dash
3
a
: to break away from control or a set course
b
: to dart off or away : flee
4
: to break away from or oppose one's previous affiliation (as with a political party or sports team)
5
: to produce seed prematurely

transitive verb

1
: to secure with a bolt
bolt the door
2
: to attach or fasten with bolts
3
: to eat hastily or without chewing
bolted his breakfast
4
: to break away from or refuse to support (something, such as a political party)
5
: to say impulsively : blurt
6
a
: flush, start
bolt rabbits
b
archaic : shoot, discharge

bolt

3 of 5

adverb

1
: in an erect or straight-backed position : rigidly
sat bolt upright
2
archaic : directly, straight

bolt

4 of 5

noun (2)

: the act or an instance of bolting

bolt

5 of 5

verb (2)

bolted; bolting; bolts

transitive verb

1
: to sift usually through fine-meshed cloth
bolt flour
2
archaic : sift sense 2

Synonyms

Verb (1)

Example Sentences

Adverb She sat bolt upright, staring straight ahead.

Word History

Etymology

Noun (1)

Middle English, from Old English; akin to Old High German bolz crossbow bolt, and perhaps to Lithuanian beldėti to beat

Verb (2)

Middle English bulten, from Anglo-French buleter, of Germanic origin; akin to Middle High German biuteln to sift, from biutel bag, from Old High German būtil

First Known Use

Noun (1)

before the 12th century, in the meaning defined at sense 1b

Verb (1)

13th century, in the meaning defined at intransitive sense 1

Adverb

15th century, in the meaning defined at sense 1

Noun (2)

1577, in the meaning defined above

Verb (2)

13th century, in the meaning defined at sense 1

Time Traveler
The first known use of bolt was before the 12th century
IELTS BNC: 5051 COCA: 4899
bolt

noun¹

1for fastening things together螺栓VERB + BOLT | PHRASES VERB + BOLTtighten, tighten up上緊螺栓loosen鬆開螺栓remove, undo, unscrew卸掉/擰開/旋出螺栓PHRASESnuts and bolts基本要點
bolt

noun²

2for fastening a door門閂VERB + BOLTdraw back, pull back, slide back拉開門閂push home, slide home插好門閂She closed the door quickly and pushed the bolts home.她快速關上門,插上門閂。
bolt

verb

ADVERB | PREPOSITION ADVERBfirmly, securely用螺栓緊緊固定住Make sure that the rails are securely bolted in place.務必確保欄杆都固定住了。together用螺栓固定在一起The two parts are bolted together.這兩部份用螺栓固定在一起。PREPOSITIONto用螺栓固定在⋯上The yacht's keel is bolted to the hull.遊艇的龍骨用螺栓固定在船身上。

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