Douglas Harper's Etymology Dictionary
1788, originally of horses; see pigeon.
Wiktionary
a. Having toes that point inwards.
WordNet
adj. having feet that turn inward [ant: splayfooted]
Usage examples of "pigeon-toed".
She wore white two-toed tabi socks and geta clogs, which gave her a slightly pigeon-toed stance that Gobi found quite charming.
A trifle pale, but that may have been the effect of her black clothing, rigid from the waist up, her shoes turned outward as befits a ballet dancer, she carried her school satchel -- which was brown, of artificial leather -- to school and her leek-green, dawn-red, and air-blue gym bags, dyed black, to Oliva or to the theater, and returned punctually and pigeon-toed, more well behaved than rebellious, to Elsenstrasse.
These baby animals, which have adorned the walls of every one of her classrooms from third grade onward, have watched over untold years of C students who never get picked for Student of the Week, sixth-place winners who never get a ribbon, and short, pigeon-toed girls who never get chased by boys at recess.