par ‧ al ‧ lel ‧ is ‧ m /ˈpærəlelɪz ə m/ BrE AmE noun [singular, uncountable] written
[ Word Family: noun : ↑ parallel , ↑ parallelism ; verb : ↑ parallel ; adjective : ↑ parallel ]
the state of being ↑ parallel with something:
There is a parallelism between fatigue and the ability to sleep.