(physics) A nuclear reaction in which nuclei combine to form more massive nuclei with the concomitant release of energy.

(nonstandard) to combine; to fuse

plural of fusion

The political practice, principle or theory of forming groups. / A political philosophy advocating fusion of traditionalist social conservatism with right-libertarianism.

plural of fusioneer

(music) A performer or composer of fusion music / An adherent of controlled nuclear fusion as a useable source of energy.

(linguistics, of a language) Tending to overlay many morphemes in a manner that can be difficult to segment.

plural of fusion center

An American government institution for centralizing intelligence between law enforcement agencies.

nuclear fusion using the conventional method of very high temperatures; in contrast to cold fusion.