noun: correction of an unstable part of the spine by joining two or more vertebrae; usually done surgically but sometimes done by traction or immobilization
noun: the combining of images from the two eyes to form a single visual percept
noun: an occurrence that involves the production of a union
noun: a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
noun: the merging of adjacent sounds or syllables or words