bond-dissociation energy (BDE) in theoretical chemistry

https://dx.doi.org/10.1351/goldbook.BT07006
For a diatomic molecule, the maximum vibrational energy that a molecule can have prior to its decomposition into the ground electronic states of the constituent atoms (spectroscopic bond-dissociation energy, D e). The D e value is related to the chemical dissociation energy: D 0 = D e − E vib 0, where E vib 0 is zero-point vibrational energy. This definition is usually extended to the dissociation of polyatomic molecules into certain molecular fragments through homolytic or heterolytic bond cleavages.
Source:
PAC, 1999, 71, 1919 (Glossary of terms used in theoretical organic chemistry) on page 1928