noun. a narrow, elongated depression, groove, notch, slit, or aperture, especially a narrow opening for receiving or admitting something, as a coin or a letter. a place or position, as in a sequence or series: The program received a new time slot on the broadcasting schedule.
: an originally coin-operated gambling machine that pays off according to the matching of symbols on wheels spun by a handle. also : an electronic version of this machine.
