minus in WordNet English dictionary

1. 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"
   subtraction  minus 
   

1. on the negative side or lower end of a scale
   "minus 5 degrees"; "a grade of B minus"
   minus 
   
2. involving disadvantage or harm
   "minus (or negative) factors"
   minus  negative