What is electronegativity?

What is electronegativity?

Electronegativity is the tendency of atoms to attract a shared pair of electrons towards themselves in a covalent bond formed between it and another atom.

or,

The capacity of an element to attract more shared electrons between two elements during the formation of a covalent bond towards it is called its electronegativity.

or,

When two atoms of a molecule are bonded covalently, the ability of an atom that is bonded to another atom or atoms to attract electrons to itself is called electronegativity.