Dictionary > English Dictionary > Definition, synonym and antonym of bolt
Meaning of bolt by Wiktionary Dictionary


    a fastening bolt
    a door bolt
    bolts of fabric


    • ( UK ) IPA: /bɒlt/, /bəʊlt/; X-SAMPA: /bQlt/, /b@Ult/
    • Rhymes: -əʊlt or Rhymes: -ɒlt
    • ( US ) IPA: /boʊlt/

    Etymology 1

    From Proto-Germanic *bultaz, perhaps from Proto-Indo-European *bheld- ( “to knock, strike” ). Akin to Dutch bout, German Bolz or Bolzen, Icelandic bolti, Danish bolt .


    bolt ( plural: bolts )

    1. A ( usually ) metal fastener consisting of a cylindrical body that is threaded, with a larger head on one end. It can be inserted into an unthreaded hole up to the head, with a nut then threaded on the other end; a heavy machine screw .
    2. A sliding pin or bar in a lock or latch mechanism.
    3. A bar of wood or metal dropped in horizontal hooks on a door and adjoining wall or between the two sides of a double door, to prevent the door( s ) from being forced open .
    4. A sliding mechanism to chamber and unchamber a cartridge in a firearm .
    5. A shaft or missile intended to be shot from a crossbow or a catapult, especially a short, stout arrow .
    6. A lightning spark, i.e., a lightning bolt .
    7. A sudden event, action or emotion .
      The problem's solution struck him like a bolt from the blue .
    8. A large roll of fabric or similar material, as a bolt of cloth .
    9. ( nautical ) The standard linear measurement of canvas for use at sea: 39 yards .
    Derived terms
    See also


    bolt ( third-person singular simple present bolts present participle bolting, simple past and past participle bolted )

    1. To connect or assemble pieces using a bolt .
      Bolt the vice to the bench .
    2. To secure a door by locking or barring it .
      Bolt the door .
    3. ( intransitive ) To flee, to depart, to accelerate suddenly .
      Seeing the snake, the horse bolted .
      The actor forgot his line and bolted from the stage .
    4. ( intransitive ) To escape .
    5. ( intransitive ) Of a plant, to grow quickly; to go to seed .
      Lettuce and spinach will bolt as the weather warms up .
    6. To swallow food without chewing it.
    7. To drink one's drink very quickly; to down a drink .
      Come on everyone - bolt your drinks; I want to go to the next pub!
    8. To sift the bran and germ from wheat flour .
      Graham flour is unbolted flour .

    Etymology 2

    From Middle English bulten, from Anglo-Norman buleter, cognate with Middle High German biuteln ( “to sift” )


    bolt ( third-person singular simple present bolts present participle bolting, simple past and past participle bolted )

    1. To sift, especially through a cloth .
    Derived terms


Explanation of bolt by Wordnet Dictionary


    1. make or roll into bolts

    2. bolt fabric
    3. eat hastily without proper chewing

    4. Don't bolt your food!
    5. swallow hastily

    6. secure or lock with a bolt

    7. bolt the door
    8. move or jump suddenly

    9. She bolted from her seat
    10. leave suddenly and as if in a hurry

    11. The listeners bolted when he discussed his strange ideas
    12. run away

    1. in a rigid manner

    2. he sat bolt upright
    3. directly

    1. a sudden abandonment ( as from a political party )

    2. the act of moving with great haste

    3. a screw that screws into a nut to form a fastener

    4. the part of a lock that is engaged or withdrawn with a key

    5. a sliding bar in a breech-loading firearm that ejects an empty cartridge and replaces it and closes the breech

    6. a roll of cloth or wallpaper of a definite length

    7. a discharge of lightning accompanied by thunder

    Definition of bolt by GCIDE Dictionary


    1. Bolt n. [AS. bolt; akin to Icel. bolti, Dan. bolt, D. bout, OHG. bolz, G. bolz, bolzen; of uncertain origin.]
      1. A shaft or missile intended to be shot from a crossbow or catapult, esp. a short, stout, blunt-headed arrow; a quarrel; an arrow, or that which resembles an arrow; a dart.

      Look that the crossbowmen lack not bolts. Sir W. Scott.

      A fool's bolt is soon shot. Shak.

      2. Lightning; a thunderbolt.

      3. A strong pin, of iron or other material, used to fasten or hold something in place, often having a head at one end and screw thread cut upon the other end.

      4. A sliding catch, or fastening, as for a door or gate; the portion of a lock which is shot or withdrawn by the action of the key.

      5. An iron to fasten the legs of a prisoner; a shackle; a fetter. [Obs.]

      Away with him to prison!

      lay bolts enough upon him. Shak.

      6. A compact package or roll of cloth, as of canvas or silk, often containing about forty yards.

      7. A bundle, as of oziers.

      Bolt auger, an auger of large size; an auger to make holes for the bolts used by shipwrights. -- Bolt and nut, a metallic pin with a head formed upon one end, and a movable piece ( the nut ) screwed upon a thread cut upon the other end. See B, C, and D, in illust. above.

      See Tap bolt, Screw bolt, and Stud bolt.

    2. Bolt, v. t. [imp. & p. p. Bolted; p. pr. & vb. n. Bolting.]
      1. To shoot; to discharge or drive forth.

      2. To utter precipitately; to blurt or throw out.

      I hate when Vice can bolt her arguments. Milton.

      3. To swallow without chewing; as, “to bolt food”; often used with down.

      4. ( U. S. Politics ) To refuse to support, as a nomination made by a party to which one has belonged or by a caucus in which one has taken part.

      5. ( Sporting ) To cause to start or spring forth; to dislodge, as conies, rabbits, etc.

      6. To fasten or secure with, or as with, a bolt or bolts, as a door, a timber, fetters; to shackle; to restrain.

      Let tenfold iron bolt my door. Langhorn.

      Which shackles accidents and bolts up change. Shak.

    3. Bolt ( bōlt; 110 ), v. i.
      1. To start forth like a bolt or arrow; to spring abruptly; to come or go suddenly; to dart; as, “to bolt out of the room”.

      This Puck seems but a dreaming dolt, . . .

      And oft out of a bush doth bolt. Drayton.

      2. To strike or fall suddenly like a bolt.

      His cloudless thunder bolted on their heads. Milton.

      3. To spring suddenly aside, or out of the regular path; as, “the horse bolted”.

      4. ( U.S. Politics ) To refuse to support a nomination made by a party or a caucus with which one has been connected; to break away from a party.

    4. Bolt, adv. In the manner of a bolt; suddenly; straight; unbendingly.

      [He] came bolt up against the heavy dragoon. Thackeray.

      Bolt upright. Perfectly upright; perpendicular; straight up; unbendingly erect. Addison. On the back at full length. [Obs.] Chaucer.

    5. Bolt, n. [From Bolt, v. i.]
      1. A sudden spring or start; a sudden spring aside; as, “the horse made a bolt”.

      2. A sudden flight, as to escape creditors.

      This gentleman was so hopelessly involved that he contemplated a bolt to America -- or anywhere. Compton Reade.

      3. ( U. S. Politics ) A refusal to support a nomination made by the party with which one has been connected; a breaking away from one's party.

    6. Bolt, v. t. [imp. & p. p. Bolted; p. pr. & vb. n. Bolting.] [OE. bolten, boulten, OF. buleter, F. bluter, fr. Ll. buletare, buratare, cf. F. bure coarse woolen stuff; fr. L. burrus red. See Borrel, and cf. Bultel.]

      1. To sift or separate the coarser from the finer particles of, as bran from flour, by means of a bolter; to separate, assort, refine, or purify by other means.

      He now had bolted all the flour. Spenser.

      Ill schooled in bolted language. Shak.

      2. To separate, as if by sifting or bolting; -- with out.

      Time and nature will bolt out the truth of things. L'Estrange.

      3. ( Law ) To discuss or argue privately, and for practice, as cases at law. Jacob.

      To bolt to the bran, to examine thoroughly, so as to separate or discover everything important. Chaucer.

      This bolts the matter fairly to the bran. Harte.

      The report of the committee was examined and sifted and bolted to the bran. Burke.

    7. Bolt, n. A sieve, esp. a long fine sieve used in milling for bolting flour and meal; a bolter. B. Jonson.