n.
Pronunciation: - ˌ fu ̇ t ( always so in sense 3 ), ˌ flat- '
Function: noun
Inflected Form: plural flat · feet \ - ˌ f ē t, - ' f ē t \
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