s Syllabification: (s)Translate s | into French | into German | into Italian | into Spanish Definition of s abbreviation second(s). Law section (of an act). shilling(s). Grammar singular. Chemistry solid. (in genealogies) son(s). succeeded. Chemistry denoting electrons and orbitals possessing zero angular momentum and total symmetry:s-electrons[s from sharp, originally applied to lines in atomic spectra] symbol (in mathematical formulae) distance. s in other Oxford dictionaries Definition of s in the British & World English dictionary