Definition of baseline

The word "baseline" has its origins in the mid-16th century. It comes from the Old English words "bæsc" (rod or pole) and "līn" (line). Initially, a baseline referred to the lowest or initial line of a musical staff, marking the beginning of a piece of music. Over time, the term extended to other fields, such as sports, where a baseline became the fundamental or starting point for measurement or comparison. For instance, in tennis, the baseline is the line at the back of the court, marking the initial position of the server. In business, a baseline might represent a standard or reference point for tracking progress or performance. Throughout its evolution, the word "baseline" has maintained its connection to ideas of foundation, starting point, and reference.