Negative may mean:

• Something negative can be something bad.
• A negative number is a number that is less than zero. 5 - 8 = -3.
• Some people also use negative the same way as "no", or other related words. "Not", "Never", "Nowhere" etc. are all negative words. On two-way radios the word "negative" is used instead of "no" to be clearer.
• In film photography, a film negative is an exposed picture or movie film that has been processed, and is ready to be used to make a print. In a negative, everything in the picture has the opposite color. Things that are white will be black, things that are red will be green, and things that are orange will be blue.
• Negative binary numbers
• Negative charge
• Negative exponent
• Negative feedback, a basic concept of cybernetics; it is the basis of regulation and control. It is important in engineering and physiology. In biology and physiology negative feedback is known as homeostasis
• Negative gravity