[ flat-foot or, for 1, -foot ]
See synonyms for flatfoot on Thesaurus.com
noun,plural flat·feet for 1, flat·foots for 2, 3.
  1. Pathology.

    • a condition in which the arch of the foot is flattened so that the entire sole rests upon the ground.

    • Also flat foot. a foot with such an arch.

  2. Slang. a police officer; cop.

  1. Older Slang. a sailor.

Origin of flatfoot

First recorded in 1865–70; flat1 + foot

Words Nearby flatfoot

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use flatfoot in a sentence

  • It is bad shoeing that makes so many people suffer from flatfoot.

    The Girls of Central High | Gertrude W. Morrison
  • There was no need to measure them particularly; all they needed was an ordinary set of flatfoot braces.

    Psychotherapy | James J. Walsh
  • Out of twenty-four who thought they had rheumatism in the feet or legs eighteen proved to be cases of flatfoot.

    Psychotherapy | James J. Walsh
  • There is, at the present day, a tendency to recommend too freely the wearing of flatfoot braces or arches.

    Psychotherapy | James J. Walsh
  • It must not be forgotten that the worst forms of cold feet are found among those suffering from flatfoot.

    Psychotherapy | James J. Walsh

British Dictionary definitions for flatfoot


/ (ˈflætˌfʊt) /

  1. Also called: splayfoot a condition in which the entire sole of the foot is able to touch the ground because of flattening of the instep arch

  2. plural -foots or -feet a slang word (usually derogatory) for a policeman

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