Main Entry: flat·foot

Pronunciation: \-ˌfu̇t (always so in sense 3), ˌflat-ˈ\

Function: noun

Inflected Form(s): plural flat·feet \-ˌfēt, -ˈfēt\

Date: 1860

1 : a condition in which the arch of the instep is flattened so that the entire sole rests upon the ground
2 : a foot affected with flatfoot
3 a or plural flatfoots slang : police officer; especially : a patrolman walking a regular beat b slang : sailor