The Collaborative International Dictionary of English v.0.48:

Nought \Nought\, n. & adv.
   See Naught. --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Naught \Naught\ (n[add]t), n. [OE. naught, nought, naht, nawiht,
   AS. n[=a]wiht, n[=a]uht, n[=a]ht; ne not + [=a] ever + wiht
   thing, whit; hence, not ever a whit. See No, adv. Whit,
   and cf. Aught, Not.]
   1. Nothing. [Written also nought.]
      [1913 Webster]

            Doth Job fear God for naught?         --Job i. 9.
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   2. The arithmetical character 0; a cipher. See Cipher.
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   To set at naught, to treat as of no account; to disregard;
      to despise; to defy; to treat with ignominy. "Ye have set
      at naught all my counsel." --Prov. i. 25.
      [1913 Webster]

WordNet (r) 3.0 (2006):

nought
    n 1: a mathematical element that when added to another number
         yields the same number [syn: zero, 0, nought,
         cipher, cypher]