chalk.
A soft, white, powdery limestone (calcium carbonate, CaCO₃).
Meaning & usage
A soft, white, powdery limestone (calcium carbonate, CaCO₃).
chalk cliffs are not recommended for climbing
A piece of chalk, or nowadays processed compressed gypsum (calcium sulfate, CaSO₄), that is used for drawing and for writing on a blackboard (chalkboard).
Tailor's chalk.
A white powdery substance used to prevent hands slipping from holds when climbing, or losing grip in weight-lifting or gymnastics, sometimes but not always limestone-chalk, often magnesium carbonate (MgCO₃).
when working out your next move, it's a good idea to get some more chalk from the bag
A platoon-sized group of airborne soldiers.
The favorite in a sporting event.
The prediction that there will be no upsets, and the favored competitor will win.
Where this word comes from
Etymology tree Latin calxbor. Proto-West Germanic *kalk Old English ċealc Middle English chalk English chalk Inherited from Middle English chalk, chalke, from Old English ċealc, from Proto-West Germanic *kalk, borrowed from Latin calx (“limestone”), again borrowed from Ancient Greek χάλιξ (khálix, “pebble”). Doublet of calx and cauk.
To apply chalk to anything, such as the tip of a billiard cue.
chalk your hands before climbing
To record something, as on a blackboard, using chalk.
To use powdered chalk to mark the lines on a playing field.
To record a score or event, as if on a chalkboard.
To manure (land) with chalk.
To make white, as if with chalk; to make pale; to bleach.
Where this word comes from
Etymology tree Latin calxbor. Proto-West Germanic *kalk Old English ċealc Middle English chalk English chalk Inherited from Middle English chalk, chalke, from Old English ċealc, from Proto-West Germanic *kalk, borrowed from Latin calx (“limestone”), again borrowed from Ancient Greek χάλιξ (khálix, “pebble”). Doublet of calx and cauk.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.