THANK, v.t. 1. To express gratitude for a favor; to make acknowledgments to one for kindness bestowed. We are bound to thank God always for you. 2 Thess 1. Joab bowed himself and thanked the king. 2 Sam.14.2. It is used ironically. Weigh the danger with the doubtful bliss, And thank yourself, if aught should fall amiss.