chalk

/tʃɔ:k/
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chalk

A teacher writes a math problem on the blackboard with a piece of chalk.

Definition
  1. Noun:

    • A soft, white, porous sedimentary rock: A form of limestone composed primarily of the mineral calcite, often used historically for writing and drawing.
    • A writing or drawing implement: A stick or crayon made of this rock or a similar substance, used for writing on surfaces like blackboards.
    • A pure, flat white color: A color with very little reflectance, resembling the color of chalk.
    • (Slang) A powdered drug: Specifically, a slang term for methamphetamine, especially in its crystalline form.
  2. Verb:

    • To write or draw with chalk: To mark, write, or draw on a surface using a chalk implement.
    • To mark or treat with chalk: To apply chalk to something, such as a billiard cue or a playing field.
Usage Examples
  • Noun:

    • The teacher picked up a piece of chalk to write on the blackboard.
    • The cliffs of Dover are made of white chalk.
    • She painted the wall in a matte chalk finish.
  • Verb:

    • Please chalk the day's specials on the menu board.
    • The referee chalked the foul on the sideline.
Advanced Usage
  • "to chalk something up to experience": To accept a failure or bad situation as a learning opportunity.

    • I lost the match, but I'll just chalk it up to experience.
  • "to chalk something up": To achieve or score something; to attribute something to a particular cause.

    • The team chalked up another victory last night.
    • We can chalk his success up to hard work.
  • "to chalk out": To sketch or plan something roughly.

    • They chalked out a basic strategy for the project.
Variants and Related Words
  • Chalky (adj): Resembling or containing chalk; having a dry, pale texture or color.

    • The soil had a chalky consistency.
  • Chalkboard (n): A blackboard, a surface for writing on with chalk.

  • Tailor's chalk (n): A chalk used by tailors to mark fabric.
Synonyms
  • Noun (for the rock): Limestone, calcite.
  • Noun (for the implement): Crayon, pastel.
  • Verb: Scribble, sketch, mark.
Related Phrasal Verbs
  • Chalk up: To score, achieve, or record something; to attribute.

    • He chalked up ten points in the first quarter.
  • Chalk out: To outline or plan.

    • Let's chalk out the route before we leave.
Related Idioms
  • As different as chalk and cheese: To be completely different from each other.

    • My brother and I are as different as chalk and cheese.
  • Not by a long chalk (also by a long chalk): Not at all; by no means (used for emphasis, often in British English).

    • The problem isn't solved, not by a long chalk.
  • Walk the chalk (line): To behave correctly and follow rules strictly.

    • After the warning, he knew he had to walk the chalk.
chalk

A teacher writes a math problem on the blackboard with a piece of chalk.

Noun
  1. a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces
  2. an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
  3. a pure flat white with little reflectance
  4. a soft whitish calcite
Verb
  1. write, draw, or trace with chalk