Source : Webster's Revised Unabridged Dictionary (1913)

Minus \Mi"nus\, a. [L. See {Minor}, and cf. {Mis-} pref. from
   the French.] (Math.)
   Less; requiring to be subtracted; negative; as, a minus
   quantity.

   {Minus sign} (Math.), the sign [-] denoting minus, or less,
      prefixed to negative quantities, or quantities to be
      subtracted. See {Negative sign}, under {Negative}.

Source : WordNet®

minus
     n : an arithmetic operation in which the difference between two
         numbers is calculated; "the subtraction of three from
         four leaves one"; "four minus three equals one" [syn: {subtraction}]

minus
     adj 1: on the negative side or lower end of a scale; "minus 5
            degrees"; "a grade of B minus" [ant: {plus}]
     2: involving disadvantage or harm; "minus (or negative)
        factors" [syn: {negative}]

Source : Free On-Line Dictionary of Computing

minus
     
        -
     
        Common: dash; {ITU-T}: hyphen; {ITU-T}: minus.  Rare:
        {INTERCAL}: worm; option; dak; bithorpe.