minus

(noun) an arithmetic operation in which the difference between two numbers is calculated. Synonyms: subtraction. Examples: "The subtraction of three from four leaves one." "Four minus three equals one."

(adj) on the negative side or lower end of a scale. Synonyms: minus (vs. plus). Examples: "Minus 5 degrees." "A grade of b minus."

(adj) involving disadvantage or harm. Synonyms: negative. Example: "Minus (or negative) factors."