Definition of Fundamentalism is an article I wrote on what is fundamentalism (from my point of view as a missionary dealing with many different churches).
I came across an interesting book by South African Johan Malan called “The Old Testament Law and the New Testament Grace“. One of his chapters immediately perked my interest, Christian Fundamentalism. Mahan “attempts” to define what is distinctive about Christian Fundamentalism. I say attempts because I doubt anybody can pin it down completely, but Malan gives it a pretty good shot.
I reproduce his main points on Definition of Fundamentalism for your consideration but read the article (link above) because it appears to be very interesting.