nn.

nn.

1. plural of n.; nerves

nn.

1. (law) Abbreviation of notes.
2. (law) Abbreviation of footnotes.

This is the customary abbreviation of this term as used in legal citation. See, e.g., The Bluebook: A Uniform System of Citation, Nineteenth Edition (2010), "Subdivisions", Table T16, p. 472-73.

• hist. nn.