H1Pronunciation: /eɪtʃ/ (also h)Translate H | into French | into German | into Italian | into Spanish Definition of H noun (plural Hs or H's) 1the eighth letter of the alphabet. denoting the next after G in a set of items, categories, etc.. (h) Chess denoting the file on the right-hand edge of the board, as viewed from White’s side. 2a shape like that of a capital H: [in combination]:a widened H-strap for lateral support 3 Music (in the German system) the note B natural. H in other Oxford dictionaries Definition of H in the US English dictionary