الظلف 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.

• الظُّلْفُ

  [ الظُّلْفُ ذ in Har p. 312, there said to be used as meaning Continence, and disdain of base actions, is app. a mistake for الظَّلْفُ, inf. n. of 1 in the phrase ظَلَفَ نَفْسَهُ.]…

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• الظُّلَفُ

  [ الظُّلَفُ ذ in Har p. 623, there said to mean The restraining the soul from its desire, or blamable inclination, is app. a mistranscription for الظَّلَفُ, inf. n. of ظَلِفَتِ النَّفْسُ.]…

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