خوف doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has 2 entries for it, distinguished by diacritics. Select one below for the full classical Arabic definition.

• خَافَ Form 1

  1 خَافَ خاف خافي , (S, Msb, K, &c.,) originally خَوِفَ, (Lth, L, &c.,) first pers. خِفْتُ, (TA,) aor. يَخَافُ, (S, K, &c.,) originally يَخْوَفُ, (L,) imperative خَفْ, (S,) inf. n. خَوْفٌ (S, Msb, K, &c.) and , [originall…

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• خَوْفٌ

  خَوْفٌ خائف خوف inf. n. of 1. (S, Msb, K, &c.) -b2- Also Slaughter: whence, وَلَنَبْلُوَنَّكُمْ بِشَىْءٍ مِنَ ٱلْخَوْفِ [And we will assuredly try you with somewhat of slaughter]; (Lh, K;) in the Kur [ii. 150]. (TA.) [Se…

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