1. 78(n = noun.quantity) lxxviii, seventy-eight - the cardinal number that is the sum of seventy and eight;
is a kind of large integer
2. 78(n = noun.artifact) seventy-eight - a shellac based phonograph record that played at 78 revolutions per minute;
is a kind of disc, disk, phonograph record, phonograph recording, platter, record
78(s = adj.all) lxxviii, seventy-eight - being eight more than seventy;