| Noun | 1.78 - the cardinal number that is the sum of seventy and eightLXXVIII, seventy-eightlarge integer - an integer equal to or greater than ten | | 2.78 - a shellac based phonograph record that played at 78 revolutions per minuteseventy-eightphonograph record, phonograph recording, disc, platter, record, disk - sound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove | Adj. | 1. 78 - being eight more than seventy lxxviii, seventy-eightcardinal - being or denoting a numerical quantity but not order; "cardinal numbers" |