base line or base·line (bāslīn)
n.
►
■ A line serving as a basis, as for measurement, calculation, or location.
■ A measurement, calculation, or location used as a basis for comparison.
► Baseball. The base path.
► Sports.
■ The boundary line at either end of a court, as in basketball or tennis.
■ The area near this boundary line:
made a basket from the base line.
■ A style of play in tennis in which the player remains near the base line and rarely approaches the net.

[TahlilGaran] American Dictionary ▲