To cause to be excessively crowded: a system of consolidation that only overcrowded the classrooms. (verb-transitive)
To crowd together excessively.(verb-intransitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "overcrowd" in a sentence
"They do not "overcrowd" and their value in the workplace is not any less than their male colleagues."
"When cooking them, Ms. Lo advises home cooks not to overcrowd the pan and to make sure the pan is quite hot."
"If need be, cook scallops in batches so as not to overcrowd the pan."