D defs.my
Entry 1 sense Webster, 1913

Satan

/(sā"tan, săt"an obs )/ · Sa·tan · IPA /ˈseɪ.tən/
01 n. The grand adversary of man; the Devil, or Prince of darkness; the chief of the fallen angels; the archfiend.
  1. 1.
    The grand adversary of man; the Devil, or Prince of darkness; the chief of the fallen angels; the archfiend.obs
    “I beheld Satan as lightning fall from heaven.” — Luke x. 18.