The Collaborative International Dictionary of English v.0.48:
Ann \Ann\, Annat \An"nat\, n. [LL. annata income of a year,
also, of half a year, fr. L. annus year: cf. F. annate
annats.] (Scots Law)
A half years's stipend, over and above what is owing for the
incumbency, due to a minister's heirs after his decease.
V.E.R.A. -- Virtual Entity of Relevant Acronyms (September 2014):
Artificial Neural Networks (NN)
Bouvier's Law Dictionary, Revised 6th Ed (1856):
ANN, Scotch law. Half a year's stipend over and above what is owing for the
incumbency due to a minister's relict, or child, or next of kin, after his
decease. Wishaw. Also, an abbreviation of annus, year; also of annates. In
the old law French writers, ann or rather an, signifies a year. Co. Dig h.v.