constant

Universal Words adjective, noun adjective 1 [usuallybeforenoun] happening all the time or repeatedly: constant interruptions * a constant stream of visitors all day * Babies need constant attention. * This entrance is in constant use. 2 that does not change SYNFIXED: travelling at a constant speed of 50 m.p.h. * Ross was his most constant and loyal friend. noun (mathematics, physics) a number or quantity that does not vary OPPVARIABLE