The definition of a coordinate bond is a chemical bond between two atoms when one of the atoms shares a pair of electrons.
An example of a coordinate bond is the relationship between hydrogen chloride and ammonia when the ammonium ions are formed by the transfer of a hydrogen ion to the pair of electrons in the ammonia molecule.
the type of covalent bond in which the shared pair of electrons is supplied by only one of the atoms; dative bond
A covalent chemical bond between two atoms that is produced when one atom shares a pair of electrons with another atom lacking such a pair. Also called coordinate covalent bond.