kilter n. (Also spelled kelter) Regular order or proper condition. Same as kelter, but kilter is the more common spelling in the U. S. Used chiefly in the phrase out of kilter, meaning out of order or irregular in some manner.
... that little Tidditt thing I might feel different. But, considerin' that I got this horn from Mr. Bangs, I'm willin' to let bygones be past. It helps my hearin' a lot. Them ear-fixin's was good while they lasted, but they got out of kilter quick. I shan't bother Mr. Bangs. If he can square his own ... — Cy Whittaker's Place • Joseph C. Lincoln