from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A lecture, often informal, illustrated with diagrams chalked on a blackboard.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An informal lecture on an academic subject.
- n. A music hall act in which a performer makes chalk caricatures whilst reciting a monologue
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a talk that uses a blackboard and chalk
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