ad. A conventional formula for ending a letter, used when the salutation addresses the person for whom the letter is intended by his or her name.
the GNU version of the Collaborative International Dictionary of English
ad. Purely; without alloy.
ad. Honestly; unfeignedly; without dissimulation.
The Century Dictionary and Cyclopedia
In a sincere manner, in any sense of the word sincere; wholly; purely; with truth; truly; really.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
ad. written formula for ending a letter
ad. with sincerity; without pretense
Word Usage
"Before you buy a bunch of the high-power Garrett or BB ammo, bear in mind that even with a scope this rifle weighs only 8 ½ pounds, and it really, most sincerely, is going to kick."