Chemistry, Trademark.

a brand of diethyltoluamide.



plural noun Informal.

details: Do you have any deets on their divorce?

Origin of deets

First recorded in 1985–90; by shortening and alteration Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for deet

Historical Examples of deet

  • Deet to goodness, them Irishers have been the plagues of my life ever since I married.'

  • Deet to goodness, my opinion is that the world 'ould go on a sight better without 'em.

British Dictionary definitions for deet


n acronym for

diethyl(meta)toluamide; an insect repellent
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

deet in Science



A colorless, oily liquid that has a mild odor and is used as an insect repellent. Its chemical name is diethyl toluamide. Chemical formula: C12H17NO.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.