ĭmāgĭnātĭo, ōnis, f. [imaginor],
a mental image , fancy , imagination (postAug.): libidinum imaginationes in somno, Plin. 20, 7, 26, § 68: provincias secretis imaginationibus agitans, Tac. A. 15, 36; Aug. Conf. 7, 5.
imāginātio ōnis, f imaginor, a fancy, imagination : secretae, Ta. ...
An Elementary Latin Dictionary