- tightly or immovably wedged in.
- Dentistry. noting a tooth so confined in its socket as to be incapable of normal eruption.
- driven together; tightly packed.
- densely populated or crowded; overcrowded: an impacted school district.
Origin of impacted
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (of a tooth) unable to erupt, esp because of being wedged against another tooth below the gum
- (of a fracture) having the jagged broken ends wedged into each other
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
- Wedged together at the broken ends. Used of a fractured bone.
- Placed in the alveolus in a manner prohibiting eruption into a normal position. Used of a tooth.
- Packed in or wedged in such a manner so as to fill or block an organ or a passage.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.