unˈpickable,a. (un-1 7 b.) 1612Beaum. & Fl.Coxcomb ii. ii, Not a door open now, but double barr'd;..and their locks unpickable.1862Catal.Internat.Exhib. II. No. 5993, The so-called ‘unpickable’ locks.1869Mrs. Whitney We Girls xii, She put her principles into her unpickable pocket.