octal /ˈɒk.təl/adjective 2noun 2forms 1 adjective2 •Concerning numbers expressed in octal or mathematical calculations performed using octal. •(historical) Being or relating to a kind of tube socket base having eight pins. noun2 •The number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7. •A digit or value in the octal number system. formsoctals
