In practice. The correction of an error committed in any process, pleading, or proceeding at law, or in equity, and which is done either of course, or by the consent of parties, or upon motion to the court in which the proceeding is pending. 3 Bl. Comm. 407, 44S; 1 Tidd, Pr. 696. Hardin v. Boyd, 113 U. S. 756, 5 Sup. Ct 771, 2S L. Ed. 1141. Any writing made or proposed as an improvement of some principal writing. In legislation. A modification or alteration proposed to be made in a bill on its passage, or an enacted law; also such modification or change when made. Brake v. Callison (C. C.) 122 Fed. 722.