n.1.Lack of appreciation.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
He smiled indulgently, concealing a hurt, not altogether new, at her persistent inappreciation of this side of his nature and life in which he took the greatest pride.
Yet, amidthis odd(andpresumably "fashion-forward") anomaly, hasalways shone a beacon of sensory good sense, in the form of a firmcalled Diptyque(based inParis, UK stockists) whohavealwaysstoodfirm inappreciation of the lilac.