Wiktionary(5.00 / 1 vote)Rate this definition: 1  deflection(Noun) The act of deflecting or something deflected. 2  deflection(Noun) The deviation of a needle or other indicator from its previous position.
1 Codeine use can be habit-forming even in regular doses. 2  Morphine is the most abundant opiate derived from the opium plant. 3  With hundreds of brand names, morphine is an analgesic drug that acts directly on the central nervous system.
Morphine is in a group of drugs called narcotic pain relievers. Morphine is used to treat moderate to severe pain. Short-acting morphine is taken as needed for pain.