the act or process of fusing; the state of being fused.
that which is fused; the result of fusing: A ballet production is the fusion of many talents.
Politics. a coalition of parties or factions. (initial capital letter) the political party resulting from such a coalition.
Also called nuclear fusion. Physics. a thermonuclear reaction in which nuclei of light atoms join to form nuclei of heavier atoms, as the combination of deuterium atoms to form helium atoms. Compare fission (def 2).
Ophthalmology. Also called binocular fusion. the correct blending of the images of both eyes. the perception of rapid, intermittent flashes of light as a continuous beam.