Definitions from Wiktionary (ANN)

▸ noun:  A female given name from Hebrew.
▸ noun:  A surname from Welsh.
▸ noun:  (obsolete) An annate.
▸ noun:  Abbreviation of anniversary. [A day that is an exact number of years (to the day) since a given significant event occurred. Often preceded by an ordinal number indicating the number of years.]
▸ adjective:  Abbreviation of annual. [Happening once every year.]
▸ noun:  (machine learning) Initialism of artificial neural network.
▸ noun:  (computer science) Initialism of approximate nearest neighbor.
▸ noun:  (Internet) Abbreviation of announcement. (in e-mail or newsgroup subject lines) [An act of announcing, or giving notice.]

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