a lens that causes a beam of parallel rays to diverge after refraction, as from a virtual image; a lens that has a negative focal length.
[neg-uh-tiv] /ˈnɛg ə tɪv/ adjective 1. expressing or containing negation or denial: a negative response to the question. 2. refusing consent, as to a proposal: a negative reply to my request. 3. expressing refusal to do something: He maintained a negative attitude about cooperating. 4. prohibitory, as a command or order. 5. characterized by the […]
noun 1. a clause in a sales contract, as for a series of books or records, that provides that merchandise will be sent periodically to the subscriber unless he or she notifies the company in writing that it is not wanted.
- Negative polarity
noun 1. (grammar) the grammatical character of a word or phrase, such as ever or any, that may normally be used only in a semantically or syntactically negative or interrogative context
- Negative pressure
negative pressure n. Pressure that is less than ambient temperature. negative pressure See under pressure.