Définitions
1.Particlenot (used alone to negate a verb, now chiefly with only a few particular verbs; see usage notes)
2.Particlenot, no (used before a verb, with a coordinating negative element usually following; see usage notes)
3.Particleused in a subordinate clause before a subjunctive verb (especially when the main verb expresses doubt or fear) to provide extra overtones of doubt or uncertainty (but not negating its verb); the so-called "pleonastic" or "expletive" ne
4.Particlein comparative clauses usually translated with the positive sense of the subsequent negative (clarification of this definition is needed)"Apprendre le français est plus facile qu'on ne pense."