The act, process, or condition of cohering: exhibited strong cohesion in the family unit.
Physics The intermolecular attraction by which the elements of a body are held together.
Botany The congenital union of parts of the same kind, such as a calyx of five united sepals.
[From Latin cohaesus, past participle of cohaerēre, to cling together; see cohere.] co·he'sive (-sĭv, -zĭv) adj., co·he'sive·ly adv., co·he'sive·ness n.