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2017 Word of the Year

impacted

[im-pak-tid] /ɪmˈpæk tɪd/
adjective
1.
tightly or immovably wedged in.
2.
Dentistry. noting a tooth so confined in its socket as to be incapable of normal eruption.
3.
driven together; tightly packed.
4.
densely populated or crowded; overcrowded:
an impacted school district.
Origin of impacted
1675-1685
1675-85; obsolete impact adj. (< Latin impāctus past participle of impingere to fasten, cause to collide, strike, equivalent to im- im-1 + pag-, variant stem of pangere to drive in, plant firmly + -tus past participle suffix) + -ed2; see impinge
Related forms
nonimpacted, adjective
unimpacted, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for unimpacted

impacted

/ɪmˈpæktɪd/
adjective
1.
(of a tooth) unable to erupt, esp because of being wedged against another tooth below the gum
2.
(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
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unimpacted in Medicine

impacted im·pact·ed (ĭm-pāk'tĭd)
adj.

  1. Wedged together at the broken ends. Used of a fractured bone.

  2. Placed in the alveolus in a manner prohibiting eruption into a normal position. Used of a tooth.

  3. 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.
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