Line | Definition, Etymology, Synonyms & Antonyms

Line (noun)

Definition

A line is a straight, continuous, and infinitely extending path defined by a series of points that follow a uniform direction. In geometry, it has no thickness and is often represented by a straight line segment with two endpoints.

Lines play a fundamental role in mathematics, as well as various fields like art, engineering, and physics.

Etymology

The word line originated from the Middle English word line, which came from the Old French word ligne, and ultimately from the Latin word linea. The Latin term linea referred to a string or cord, which later evolved to denote a straight or connected sequence.

Table of Contents

Synonyms

Stroke
Trace
Mark
Path
Track

Antonyms

Curve
Bend
Circle
Loop

Example

A unique example of a line is the equator. The equator is an imaginary line that circles the Earth horizontally, dividing it into the Northern Hemisphere and the Southern Hemisphere. It is at an equal distance from the North Pole and the South Pole, and its latitude is 0 degrees.

FAQs (Frequently Asked Questions)

How are lines represented in geometry?

In geometry, a line is usually represented using a straight line with two arrowheads at the ends. The arrowheads indicate that the line extends infinitely in both directions.

What are parallel lines?

Parallel lines are lines that are always the same distance apart and never intersect, even if they are extended infinitely. In two-dimensional geometry, parallel lines have the same slope.

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