Definitions for underexposeˌʌn dər ɪkˈspoʊz
Random House Webster's College Dictionary
un•der•ex•poseˌʌn dər ɪkˈspoʊz(v.t.)-posed, -pos•ing.
to expose to insufficient light, as in photography.
Origin of underexpose:
expose to too little light
"The film is underexposed, so the image is very dark"
"The child was underexposed to language"
To take a photograph using too small an exposure
To provide with insufficient publicity