What does "centerline" mean?

A line down the center of a road, generally one that divides traffic moving in opposite directions.

What is a synonym for "centerline"?

Common synonyms include: center line, ℄.

noun

noun ·Rare ·Advanced level

Noun

1
A line down the center of a road, generally one that divides traffic moving in opposite directions.
"It is particularly confusing when the motorist is channelized across the highway centerline. For long-term closures conflicting pavement markings must be removed or obliterated before relaning the roadway."
2
a line that bisects a plane figure wordnet
3
A line, either demarcated or imagined, representing the precise center (middle) of something (such that what lies on one side of it is precisely equal in size to what lies on the other side); the central axis represented by this line.
4
An imaginary line connecting the center of two fighters' bodies while they face each other.
"You might already know that, I don't know, but since you are training at home I didn't want you to be weaving wildly on each side of the rope - the goal is to pop up as tight as possible to the center line."

"In the figure shown above, two turbine engines are located under the wings, parallel to the body, with thrust acting along the body centerline."

From center + line.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.