فِسْقٌ

is a verbal noun, (S, O, K,) or a simple subst., (Msb,) from فَسَقَ [q. v]: (S, O, Msb, K:) unless as signifying [simply] A going forth, or a departure, it is said to be a word unknown before ElIslám, and to have become so much used in its legal acceptation as to be, when so used, conventionally regarded as proper (MF, TA:) [thus used,] it signifies a going forth, or departure, from the right way, (K, TA,) which is said to be the primary meaning, (TA,) or from the way of truth; (K, TA;) or from the truth, or that which is right, as in the phrase وَإِنَّهُ لَفِسْقٌ, (O, K, [in the CK لَفَسِقٌ, a strange mistake,]) in the Qur'an, 6:121; (O;) or a relinquishment, or neglect, of the command of God; (Lth, O, K;) and an inclining to disobedience; (Lth, O;) or also disobedience [itself]; (K;) or i. q. فُجُورٌ [meaning as above; or transgression; or unrighteous, sinful, wicked, vitious, or immoral, conduct]: (O, K:) it is said by El-Isbahánee to be a more general term than كُفْرٌ; applying to few sins, misdeeds, transgressions, or acts of disobedience, or to little thereof; and also, to many, or much thereof; but is commonly known as applying to the latter: and it is related on the authority of Málik that in the Qur'an, 6:146 it means such as is slaughtered: (TA:) [being used as a subst.,] it sometimes has a plural, which is فُسُوقٌ. (TA.)