>Nationalism is a political, social, and economic ideology and movement characterized by the promotion of the interests of a particular nation,[1] especially with the aim of gaining and maintaining the nation's sovereignty (self-governance) over its homeland.

https://en.wikipedia.org/wiki/Nationalism

The very concept of a national interest is somewhat nationalist, but then I don't believe that "nationalist" always implies "to the detriment of other nations". It often does, due to zero-sum thinking, but it's not intrinsically necessary to the concept of nationalism.

(also, exercising nationalism against a colonial power may be to its detriment but also be morally good. This obviously does not apply in the case of France, which itself is a colonial power)

I was looking up nationalism on Ambrose Bierce's Devil's Dictionary, but didn't find it (probably too sensitive a subject at the time), so here's its definition of politics:

> POLITICS, n. A strife of interests masquerading as a contest of principles. The conduct of public affairs for private advantage.

This is hardly relevant, but I'm using the occasion to share the great piece of satire that's Devil's Dictionary. Here's a few others:

> OCEAN, n. A body of water occupying about two-thirds of a world made for man — who has no gills.

> POLITENESS, n. The most acceptable hypocrisy.

> PERFECTION, n. An imaginary state or quality distinguished from the actual by an element known as excellence; an attribute of the critic.

Edit:

> PREJUDICE, n. A vagrant opinion without visible means of support.