epidemic
1. ep.i.dem.ic \.ep-*-'dem-ik\ \-i-k*l\ \-i-k(*-)le-\ \-.dem-'is-*t-e-\ aj [F e`pide`mique, fr. MF, fr. epidemie, n., epidemic, fr. LL ep]idemia, fr. Gk epide-mia visit, epidemic, fr. epide-mos visiting, epidemic, fr. epi- + de-mos people 1a: affecting many persons at once 1b: EPIPHYTOTIC 1c: EPIZOOTIC 2: excessively prevalent - ep.i.dem.i.cal aj 2. epidemic n 1: an outbreak of epidemic disease 2: an outbreak or product of sudden rapid spread, growth, or development; (Xspecif : a natural population suddenly and greatly enlarged
Webster's English Dictionary