To perceive, to imagine.
1847. He always conceited I was a sort of a sister to him!T. B. Thorpe, The Big Bear of Arkansas: Billy Warwicks Courtship and Wedding, p. 103 (Phila.).
1856. If you do conceit that you ve discovered something of the sort, the natives will soon argue you down flat on it.Knick. Mag., xlviii. 505 (Nov.).
1878. As soon as he conceited what was up, he gathered a dornick, and was just drawin back to send the strange dog where theys no fleas, when the stranger saw him and went one better.J. H. Beadle, Western Wilds, p. 185.