chalk
— Noun
– English
～ 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
chalk
— Noun
– English
～ a pure flat white with little reflectance
chalk
— Noun
– English
～ 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
chalkboard
— Noun
– English
～ sheet of slate; for writing with chalk
chalkstone
— Noun
– English
～ a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout
chalky
— Adjective
– English
～ of something having the color of chalk; "she turned chalky white"
chalky
— Adjective
– English
～ composed of or containing or resembling calcium carbonate or calcite or chalk
challah
— Noun
– English
～ (Judaism) a loaf of white bread containing eggs and leavened with yeast; often formed into braided loaves and glazed with eggs before baking
challenge
— Verb
– English
～ issue a challenge to; "Fischer challenged Spassky to a match"
challenge
— Verb
– English
～ raise a formal objection in a court of law
challenge
— Verb
– English
～ take exception to; "She challenged his claims"
challenge
— Verb
– English
～ ask for identification; "The illegal immigrant was challenged by the border guard"
challenge
— Noun
– English
～ a formal objection to the selection of a particular person as a juror
challenge
— Noun
– English
～ a demand by a sentry for a password or identification
challenge
— Noun
– English
～ questioning a statement and demanding an explanation; "his challenge of the assumption that Japan is still our enemy"