Source : Webster's Revised Unabridged Dictionary (1913)

Daytime \Day"time`\ (-t[imac]m`), n.
   The time during which there is daylight, as distinguished
   from the night.

Source : WordNet®

daytime
     adj : happening during or appropriate to the day; "a daytime job";
           "daytime television"; "daytime clothes" [ant: {nighttime}]
     n : the time after sunrise and before sunset while it is light
         outside; "the dawn turned night into day"; "it is easier
         to make the repairs in the daytime" [syn: {day}, {daylight}]
         [ant: {night}]