Co-ordinate covalent bonds are usually formed in reactions that involve two non-metals such as a hydrogen atom or during bond formation between metals ions and ligands.
Co-ordinate bond is a type of alternate covalent bond that is formed by sharing of electron pair from a single atom. Both shared electrons are donated by the same atom. It is also called dative bond or dipolar bond.
one atom alone contributes its two electrons for the bond formation. Such a type of bond formed is called the co-ordinate bond.
Final Answer:
The meaning of coordinate bond is a covalent bond that consists of a pair of electrons supplied by only one of the two atoms it joins.