parallelism Syllabification: (par·al·lel·ism)Pronunciation: /ˈparəlelˌizəm/Definition of parallelism noun the state of being parallel or of corresponding in some way. the use of successive verbal constructions in poetry or prose that correspond in grammatical structure, sound, meter, meaning, etc.. the use of parallel processing in computer systems. Derivatives parallelisticPronunciation: /ˌparəlelˈistik/ adjective parallelism in other Oxford dictionaries Definition of parallelism in the British & World English dictionary