know–nothingism

1 capitalized K&N :  the principles and policies of the Know-Nothings

2 :  the condition of knowing nothing or desiring to know nothing or the conviction that nothing can be known with certainty especially in religion or morality

3 often capitalized K&N :  a mid-20th century political attitude characterized by anti-intellectualism, exaggerated patriotism, and fear of foreign subversive influences