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army ant

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noun
  1. any of the chiefly tropical ants of the suborder Dorylinae that travel in vast swarms, preying mainly on other insects.
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Origin of army ant

First recorded in 1870–75
Also called driver ant, legionary ant.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for army ant

Historical Examples

  • He only feared one kind of ant, the army-ant, which sometimes travels in hordes of millions, eating all that it comes upon.

    The Mad Planet

    Murray Leinster


British Dictionary definitions for army ant

army ant

noun
  1. any of various mainly tropical American predatory ants of the subfamily Dorylinae, which live in temporary nests and travel in vast hordes preying on other animalsAlso called: legionary ant See also driver ant
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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