شيخ doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has 3 entries for it, distinguished by diacritics. Select one below for the full classical Arabic definition.

• شَاخَ Form 1

  1 شَاخَ ذ , (S, A, Msb, K,) aor. يَشِيخُ, (S, Msb, K,) inf. n. شَيَخٌ, with fet-h to the ى, (S, K,) and شُيُوخَةٌ (K) and شِيُوخَةٌ (TA) and شُيُوخِيَّةٌ (K) and شِيُوخِيَّةٌ (Zbd, TA) and شَيْخُوخَةٌ [the most common fo…

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• شيّخ Form 2

  2 شيّخ ذ : see the preceding paragraph. -A2- شيّخهُ, (S, K,) inf. n. تَشْيِيخٌ, (TA,) He called him by the appellation of شَيْخ, to pay him honour, or respect. (S, K, TA.) -A3- And شيّخ عَلَيْهِ He attributed or imputed …

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• شَيْخٌ

  شَيْخٌ ذ (S, A, Mgh, L, Msb, K, &c.) and , (K,) but the latter is a strange word, mentioned by some of the expositors of the Fs, as expressing more than the former word, (MF,) [An old, or elderly, man; an elder, as meani…

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