Main Entry: flat

Pronunciation: \ˈflat\

Function: adjective

Inflected Form(s): flat·ter; flat·test

1 : being or characterized by a horizontal line or tracing without peaks or depressions <the EEG is ominously flat indicating that her brain function is gone—Don Gold>
2 : characterized by general impoverishment in the presence of emotion-evoking stimuli <flat affect often occurs in schizophrenia>

—flat·ness noun