Also found in: Dictionary, Thesaurus, Idioms, Encyclopedia, Wikipedia.


a condition in which one or more arches of the foot have flattened out; called also pes planus, pes valgus, platypodia, and tarsoptosis.

pes pla·'nus

a condition in which the longitudinal arch is broken down, the entire sole touching the ground.
Synonym(s): flatfoot, talipes planus


/flat·foot/ (flat´foot) a condition in which one or more arches of the foot have flattened out.


1. pl. flat·feet (-fēt′) A condition in which the arch of the foot is abnormally flattened down so that the entire sole makes contact with the ground.
2. pl. flat·foots
a. Informal A person with flat feet.
b. Slang A police officer.
intr.v. flat·footed, flat·footing, flat·foots
To walk in a flat-footed manner: "He flatfooted along, twirling his club" (James T. Farrell).


an abnormal but relatively common condition characterized by the flattening out of the arch of the foot. Also called pes planus. See also fallen arch.
enlarge picture

tal·i·pes pla·nus

(tal'i-pēz plā'nŭs)
A condition in which the longitudinal arch is broken down, the entire sole touching the ground.
Synonym(s): flatfoot, pes planus.


Enlarge picture
Abnormal flatness of the sole and the arch of the foot. This condition may exist without causing symptoms or interfering with normal function of the foot. The inner longitudinal and anterior transverse metatarsal arches may be depressed. This condition may be acute, subacute, or chronic. Synonym: pes planus; splayfoot See: illustration

spasmodic flatfoot

Flatfoot in which the foot is held everted by spasmodic contraction of the peroneal muscle.

Patient discussion about flatfoot

Q. Can flat feet be repaired by surgery? I have flat feet and I’m looking for all sorts of treatments for it- I heard there is a surgery for it- is it helpful?

A. As far as I know- they don’t treat flat feet that are asymptomatic. So first of all check if it bothers you. secondly there are 2 kinds of flat feet- rigid and flexible. There are different and treated differently. Not always a surgery (which is very painful and costly) is needed– I went to a Rolf method therapist by the advice of my orthopedic and it’s much better now. Ask an orthopedic.

Q. I think my son has flat foot, how to tell for sure? I didn't notice it before, he is 3 years old now and all shoes hurt him. Does it mean he has flat foot? what else can it be?

A. Pes planus (flat foot) is not a rare condition in toddlers, and may resolves spontaneously as the child grows. It is diagnosed clinically, i.e. by a doctor such as pediatrician or pediatric orthopedic surgeon, and radiographs are not universally indicated

More discussions about flatfoot
References in periodicals archive ?
That means that the human subject will progressively correct its flatfoot by disposing to his shoes some orthesis beginning with small dimensions and, if necessary, continuing with increased orthesis dimensions.
Assets acquired are specific to Metasurg's BIO-ARCH[TM] subtalar implant, which is used in surgical treatment of flatfoot deformity.
One of Gene Hackman's few real stinkers, this 1990 turkey sees him in his default 'tough cop' setting and partnered with Dan Aykroyd's bow tie-wearing, stuffed-shirt flatfoot who - and here's the hilarious twist - has a multiple-personality disorder.
This unique superelastic implant, with a stepped bridge (available in a range of sizes from 4mm to 12mm) offers the Foot & Ankle surgeon intraoperative options for reconstruction of flatfoot and high arch conditions.
The pair finished nine lengths clear of the remainder, headed by previous winners Flatfoot Boogie, Some Officer and Ballylong ford.
Future flatfoot Shaq Fu flat out says he doesn't plan to make any further adjustments that could fix the current freebie situation.
Warwickshire line-up The Dustbowl String Band will perform some popular Americana songs and tunes, spiced up with authentic Appalachian flatfoot dancing.
Ley's expertise includes all areas of surgical and nonsurgical foot and ankle care, including surgical treatment for flatfoot deformity, bunions, hammertoes, foot and ankle fractures and arthritis.
The free admission evening of American and English folk and old-time songs and flatfoot dancing kicks off at the Somerville Arms, Leamington at 8.
Flatfoot deformity makes mobility and exercise painful, increasing the risk of reduced cardiovascular health and obesity.