the GNU version of the Collaborative International Dictionary of English
n. A principal enemy. Specifically, Satan, the grand adversary of mankind.
The Century Dictionary and Cyclopedia
n. A chief enemy; specifically, Satan, the devil.
Word Usage
"In honor of the holiday, Hawaii Five-0 executive producer Peter Lenkov is giving fans a gift — the introduction of the villainous Wo Fat, Steve McGarrett's archenemy from the original 1968 — 1980 series."