[ fahy-doh ]
See synonyms for FIDO on
  1. a system for evaporating the fog above airfield runways by the heat from burners.

Origin of FIDO

1940–45; f(og)i(nvestigation)d(ispersal)o(perations) Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use FIDO in a sentence

  • It appeared to be one of the tribe known to the unappreciative as Fidos, and to the admiring owners as Toy Poms.

    Mrs. Vanderstein's jewels | Mrs. Charles Bryce
  • Gubernia civilia eos tanquam subditos minus fidos, haud sine verisimilitudinis specie, habebunt.

    The History of Freedom | John Emerich Edward Dalberg-Acton