a talk or lecture in which the speaker illustrates points by drawing on a blackboard: The coach gave a chalk talk before the big game.
Solving the Mystery Of Babbling Baby Talk“Baby needa burpie?! Yeees?? [burp] Oh! WHOOOZa good baby? YOU are! Yeeesssssyouare!” Whether you find this adorable or aggravating, gaggles of parents around the world speak to their infants in singsong “goos” and “gahs.” The style has diverse names, from baby talk and motherese (but what about Dad?) to the neutral and more official-sounding child- or infant- directed speech. Whatever you choose to call it, …
Origin of chalk talk
An Americanism dating back to 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for chalk talk
US and Canadian an informal lecture with pertinent points, explanatory diagrams, etc, shown on a blackboard
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012