سأب 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.

• سَأَبَهُ Form 1

  1 سَأَبَهُ ذ , (S, M, K,) aor. سَأََ , (M, K,) inf. n. سَأْبٌ, (S, M,) He throttled him, syn. خَنَقَهُ; (S, M, IAth, K;) i. e., squeezed his throat: (IAth:) or, so that he died, (S,) or so that he killed him. (M, K.) -b…

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• سَأْبٌ

  سَأْبٌ ذ and A [skin such as is termed] زِقّ, (S, M, K,) for wine: (M:) or such as is large: (M, K:) or a زِقّ of any kind: (M:) or a receptacle of skin, or leather, in which the زِقّ is put: (M, K:) the former also occu…

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