The endpoint is the observed point in a titration at which the indicator or instrument signals that the reaction is taken to be complete, usually shown by a colour change. It is the practical signal used to stop the titration. The endpoint may differ slightly from the true stoichiometric point, and that small difference is the titration error.

终点是滴定中指示剂或仪器发出信号、表明反应被认为已完成的那一可观测点,通常以颜色变化来显示。它是用于停止滴定的实际信号。终点可能与真正的化学计量点略有差异,这一微小差异即为滴定误差。