Origin: Greek prefix hydro-
Hydrogen bond has 3 different meanings across 1 category:
a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond
A weak bond in which a hydrogen atom in one molecule is attracted to an electronegative atom (usually nitrogen or oxygen) in the same or different molecule.
To bond to another species by means of hydrogen bonds. E.g. Water hydrogen bonds with itself.