Not loyal; not true to a sovereign or lawful superior, or to the government under which one lives; false where allegiance is due; faithless; as, a subject disloyal to the king; a husband disloyal to his wife.
Here in America we are descended in blood and in spirit from revolutionists and rebels - men and women who dare to dissent from accepted doctrine. As their heirs, may we never confuse honest dissent with disloyal subversion. Dwight D. Eisenhower
What is a disloyal act? A person is disloyal if he treats you as a stranger when, in fact, he belongs to you as a friend or partner. Each of us is bound to some special others by the invisible fibers of loyalty. Lewis B. Smedes