Main Entry: ad·he·sion

Pronunciation: \ad-ˈhē-zhən, əd-\

Function: noun

Etymology: French or Latin; French adhésion, from Latin adhaesion-, adhaesio, from adhaerēre

Date: 1624

1 : steady or firm attachment : adherence
2 : the action or state of adhering
3 : the abnormal union of separate tissue surfaces by new fibrous tissue resulting from an inflammatory process; also : the newly formed uniting tissue
4 : agreement to join <adhesion of all nations to a copyright convention>
5 : the molecular attraction exerted between the surfaces of bodies in contact

— ad·he·sion·al \-ˈhēzh-nəl, -ˈhē-zhə-n^əl\ adjective