<p><strong>Noun:</strong></p><ul><li>a soft, white, powdery limestone consisting chiefly of fossil shells of foraminifers.</li><li>a prepared piece of chalk or chalklike substance for marking, as for writing on a blackboard.</li><li>a mark made with chalk.</li><li>a score or tally.</li><li>Sports Slang: the competitor considered most likely to win by the oddsmakers; favorite: If you don’t know anything about either team, just bet the chalk.</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>to mark or write with chalk.</li><li>to rub over or whiten with chalk.</li><li>to treat or mix with chalk: to chalk a billiard cue.</li><li>to make pale; blanch: Terror chalked her face.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>(of paint) to powder from weathering.</li></ul><p><strong>Adjective:</strong></p><ul><li>of, made of, or drawn with chalk.</li></ul><p><strong>Verb Phrase:</strong></p><ul><li>to score or earn: They chalked up two runs in the first inning.</li><li>to charge or ascribe to: It was a poor performance, but may be chalked up to lack of practice.</li></ul>