Gain or GAIN may refer to: Look up gain in Wiktionary, the free dictionary. Science and technology Gain (electronics), an electronics and signal processing term Antenna gain Gain (laser), the amplification involved in laser emission Gain (projection screens) Information gain in decision trees, in mathematics and computer science GAIN domain, a protein domain Learning rate, a tuning parameter in stochastic approximation methods, also known as gain Health Primary and secondary gain, psychological mechanisms that may underlie an illness Global Appraisal of Individual Needs, a set of psychological assessment instruments Global Alliance for Improved Nutrition, a Swiss Foundation working in the field of malnutrition Generating Antibiotic Incentives Now, a piece of American legislation People Gain (singer), a South Korean entertainer Gain, anglicised form of Indian surname Gayen Other uses Gain (accounting), the increase of net profit Gain (novel), a novel by American author Richard Powers Gain (EP), an album by Sadie Gain (detergent), a brand of detergent GAIN Capital, a US-based forex trading company Greater Avenues to Independence program, a precursor to the American CalWORKs welfare program See also Gein (disambiguation) Gayn (disambiguation) Gane Gian This disambiguation page lists articles associated with the title Gain.If an internal link led you here, you may wish to change the link to point directly to the intended article. Wikiwand - on Seamless Wikipedia browsing. On steroids.